I can stand there with a hafted blade and tickle a plate user with half powered hits, a 2h user of the same situation would probably kill the plate user in 2 hits as usual.
The difference being that now, powerbuild + MW LHB = cheat. Powerbuild + MW GGS isn't. Polearm wpf has a way bigger impact on speed than 2h wpf, and the animation is still too jumpy and the recover time too short. The main problem is the animation being very slow at the beginning when the strike is prepared, then way too fast when it is launched. It's not rare to see a polearm swing begin on one frame and end in the next frame. There's no point in going str polearm (apart from the very situational long maul), so allmost all polearm players just go 12/27 and nearly stunlock people with LHB/Glaive/GLA... The plate user is pretty much hopeless against a polearm agibuild, as he will never catch him due to the lack of speed, and furthermore will have difficulties blocking with all this stun stuff.
2 handers offer some possibilities for str builds (and not especially crushtrough).
On top of that, the only viable weapon for cavalry is the heavy lance, which is a polearm. Many cav are just as good on foot when they take their GLA out of their pocket. I think many polearms should be switched to another weapon class, with only the 4 attack directions weapons, that just are 2 handers with another prof anyway, and that category nerfed someway. Many real polearms (you know, when you use the thrust attack...) don't need a nerf.
Yesterday on the duelserver I've had various instances where I blocked a GLA with my longsword (had to block it twice most of the time due to polearm stun) and when I hit back, I got hit by their second attack before mine connected.
This didn't happen due to polearmstun, they were just that fast.
I'm throwing this one on my low proficiency in 2h, but maybe others experience the same.
Just this. Anyway, go on a duel server with a 2h and try to duel people like murmillus...