I've had to deal with medium ping spikes in 2011 for ~half a second+sliding, 5-10 second spikes where I can't move in 2012 and first half of 2013 up to 1-3 times a round, and small blips a few times a minute from then until now with ping between 27-50. The ping spikes did not discriminate against weapons. My connection is dream-like now compared to back then, really toned down on the rage, too.
Polearm right swing hasn't been touched and was always able to hit you at what looks like the hold animation, even with low ping. It has good hiltslash ability, too. The polearm overhead suddenly accelerates, making it faster than other animations of the same speed. I don't like how it suddenly accelerates, but I think it's not too difficult to adapt to it since it's quite short.
I definitely think it should be slowed down, but I think it's within the realm of being able to fight against it. Old polearm overhead and new polearm overhead are 2 extremes, and I want something in-between. Polearm overhead in the past was an easy double swing since it was so slow, and I'm glad that's gone at least, but it was indeed shifted too much and looks unnatural.
2h probably has one of the best overheads since it gains so much reach. It's slow, but just fast enough to avoid getting spammed. I recall Cyranule and Noodles utilizing its reach quite well. It's quite safe to say that all overheads in this game are great, depending on your turn speed.