You are operating with hindsight.
You know the Devastators, Vindicators, etc won't score hits and so can be replaced without affecting the outcome. That was unknown at the time and since the goal was to sink Japanese ships (which P-36s and Wildcats won't do) stripping down the american strike force is going to be a hard decision.
P-36 is a more limited plane than you seem to believe. Yes it is pretty good at low altitude but it sucks at high altitude, high being relative. that 3900fpm climb fades to 3000fpm at 10,000ft and is down to 2200fpm at 15,000ft.
It also is rather short ranged for combat duties. It only carries 105 US gallons when loaded for combat. the 57 gal tank behind the seat was for ferrying. The center of gravity was out of wack when filled and combat maneuvers were dangerous. There is also no quick way to dump to the fuel (unlike drop tanks).
It might have had some use as the last aerial line of defense before the AA guns but sending it out over water as the first interceptor?
As to the pilots, which is it? the good pilots used at Guadalcanal, or the poor pilots used in the strike aircraft? The US had dozens of high time fighter pilots unused at Midway but were using green, barely trained strike pilots?
The idea of putting the carriers to the north east of Midway was to put them where the Japanese were less likely to look for them. Putting them behind Midway is putting them where the Japanese are most likely to look for them. You have the advantage of knowing the Japanese did not look which as you noted, was a mistake even junior Japanese officers commented on. For the American commanders to put the carriers there without knowing the Japanese mistakes ahead of time would be foolish.
Good points, let me explain my thinking. As I have stated earlier, I am trying to do this without using hindsight, although it is difficult NOT to sometimes.
I have left the B17's at Midway and all the torpedo planes on the carriers even though none of them scored hits. B17's would be great for scouting of the Japanese battle group after initial sighting, being infinitely more survivable than a PBY.
At the time, for some reason, they expected the Japanese fleet to appear almost exactly where it came from, I believe it was because the Japanese fleet followed a storm front passing through, I'm not sure if there was any other reason. If they know where the Japanese fleet is coming from, and they did, or at least they guessed it right, then to me, the best place for our carriers is exact opposite of them on the other side of Midway Island with Midway full of fighters, and having radar. Any Japanese scout planes would have to fly over or around Midway, skirting Midways radar (which I doubt the Japanese knew about and probably didn't know its capability anyway). SO, in a straight line, you have Japanese fleet NW of Midway, then Midway full of fighters, and then SE of Midway you have the US carriers. Draw a radar circle around Midway that Japanese recon planes would have to avoid because it would be being patrolled by Wildcats, or long range Buffalos might be better. That gives a large area that should be free of Japanese recon planes, and this is without hindsight. Also, if any Japanese recon planes did skirt Midway, get around Midways radar coverage and into the carriers radar coverage, then if the carrier Wildcats intercepted them and shot them down, the Japanese would assume either, they just disappeared or that Midway fighters found them. They had no reason to suspect US carriers in that area, because they didn't know their code was broken.
During the Guadalcanal/Solomons campaign, the Japanese determined where the US carriers were just by which search planes didn't return. The search planes never radioed in, but when 1 or 2 or 3 that were close to each other on the search grid failed to return, the Japanese rightly assumed that they were downed by carrier CAP and determined correctly that US carriers were there. Any search planes that had to fly near Midway to find carriers on opposite side that disappeared, without getting off a message, would be assumed to have been lost to Midway CAP, they would not automatically assume US carriers got them. Does that make sense to you that no hindsight was needed to see this is a benefit?
Can we agree that no one knows when and where a Japanese sub could be and we were just lucky that none saw the carriers where they went and none happened to be where I would send them either?
There is no reason our carriers should ever be spotted if they are SE, but that could not have been known to them back then. Would you agree that IF the US carriers were spotted, the Japanese raid having to pass Midway with radar and 95 fighters, 100 miles (or you pick how far away US carriers are from Midway, I'm flexible on that) or so before US carriers would
1. let the 95 Midway fighters thin out the raid in a long running battle
2. allow US carriers to get every single Wildcat aloft and at proper altitude (there would be 81 Wildcats as they had not seen battle yet) and maybe even commit Dauntless dive bombers to fleet defense as they did at Coral Sea if needed
3. allow Midway fighters to attack the raid on the way back home again, picking off stragglers and cripples, any bomber flying alone would be an almost sure kill for a Wildcat, P36 or Buffalo. (in the attack that crippled Hornet, Wildcats and even Dauntless's slaughtered the Japanese attackers, most all of them flying back home in ones and two's. Could you imagine if that beaten, broken, shot up group of Japanese planes would have had to overfly Guadalcanal on the way to the US carriers, and then overfly Guadalcanal after they attacked Hornet and Enterprise? Its doubtful Hornet would have been lost and its doubtful any Japanese planes would have survived and gotten back to their carriers)
My thoughts exactly on P36. Re-read how I said I would use them: They would be the first 22 planes on the runway until radar spotted the raid, then they would launch, climb to 20,000 feet meeting with Wildcat CAP, then they would intercept at only 40 miles away from island. Do you feel that 100 gallons is enough for that mission? Maybe put enough fuel in overload tank for takeoff and climb to 20,000? (I'm flexible on that because I don't know)
Also re-read what I said about P36, that it does better lower and it would be best if they could drag Zero escort down below 12,000 feet.
Thank you for your thoughtful reply.