The torpedo issues, which were real, and which were serious, weren't fundamental problems with the torpedo designs, they were die to a total lack of testing before the torps were accepted for service. Once they got sorted out - a big problem with that, was that the same guy that was running the Torpedo Station at Newport Rhode Island, and didn't perform the testing, was now the guy at BuOrd who was constantly rejecting problem reports from the combat zones.
The Mk 13 ended up as the most effective airborne torpedo of the Late War (Just ask Yamato and Musashi - we don't know how many hits it would have taken to sink them, but we know how hany we were going to use), with the drop envelope extended from about 110 kts/100' (200kph/30m) to 300+ kts (480 kph / 5000' (1500m) with near 100% reliability.