(about 1h overheads bouncing for 100+ length)
That sounds unfortunate, mostly the last 5%, since 98-100 length overheads bounce sometimes, and ~102+ bounce almost every time. Just wanted to bring it a little more attention compared to other more known issues. This is completely anecdotal, but shorter 1h's overheads feel like they hit sooner than the longer ones..
Unlike 2h and polearm overheads that result in the weapon ending at something like -30 degrees, the 1h release animation ends with the weapon pointing straight down, this is why the weapon can bounce. The fix here, would be to rotate the wrists at the later parts of the animation so that it ends at -45 to -60 degrees. Sadly, this could be enough to cause the overhead to "bounce hit" a player like the 2h overhead does. Interestingly, the fix for the 2h overhead bounce that hits opponents(the bounce that hits players is in the animation itself, not caused by connecting with the ground) is to rotate the wrists/swing arc so that it's more circular, ending in a -45 to -60 degree range.
I'm not sure that a sweet spot between the two exists, maybe for 1h as they're shorter, but likely not for 2h. You'll either hang at the end of the animation(truncating the hang results in faster spamming of overheads), or you'll bounce on the ground.
I looked at the 1h overhead to see if it was possible the longer 1hers hit sooner, but I don't think this can be the case at all. The only explanation would be that an opponent comes into range of your weapon at a later frame by either you or your opponent moving into the swing. So for 2 stationary opponents, both weapons(long and short) would always connect at
exactly the same frame.