In other news: the value of war spears has plummeted, causing riots and rage quitting from long time polearm users. Could this be the end of an era?
But on a serious note: I've used very fast and very slow polearms, but the only time I found that polestun was useful was when I used a war spear/red tassel spear. The speed is high enough that you can get the extra hit in, and the damage is shitty enough that you need to use the stun-lock to get a clean thrust to the face in. With my quarterstaff and glaive I don't need it because I either have high enough damage or knockdown + high enough speed for my swings to connect first.
What I really wish they would nerf is the insane speed bonus you get from doing massive spins as you swing. Yes it's possible, but it would throw you off balance because of how quick you're rotating around your center with almost all of your mass behind the movement, and having your spin attack blocked would stun you or knock you off balance.