Overhead/Stab is fine for 1h.
I've seen several 1h player who use it and kill with it. Same goes for me but guess that's not much of an argument to you guys. So the reference to others.
I know 2 well respected players I havent heard complain about it even once while playing: Bjord and Vagabond.
Maybe you should just at least try to adapt to the changes and figure out new tactics and moves.
Longspear got nerfed quite a lot, right? Still I see Chase, Leyla and others perform very well with it. And it may be just skill-related and they adapted to the changes just faster than you. Or they were just willing to adapt instead of whining in the forum for weeks now...
And just a hint but cmp already posted several times that there won't be a rollback on the turningspeed changes. And that weight/length influence is a idea considered but not decided on. At least that's the last I've read about it.