So, I'm dumb and having a hard time mentally picturing the impact the changes to the shield stun will have. Characteristically speaking, who are the biggest winners and losers because I keep hearing mixed things?
I think everyone wins in varying levels.
Heavyweights win because their single accidental smash attack on shield won't ultimately end up in them getting chained to death any more, and they can maybe follow-up or at least retreat if they goof. Hard hitting moves will naturally have a boatload more shieldstun.
Any character with rapid-hitting moves also win, for obvious chain-stun reasons. Whether or not this results in a lot of shield breaks stands tournament testing, but I think they'll ultimately break
(rimshot) even.
Any character with middling or low powered hits, while still safer than before, are significantly less threatening against shield than the other two groups.
I said it previously, but Shiek may ultimately have been "hit the hardest" (in reverse??) by this. She won't get as big a reward on shield as heavy-hitters, which to me says (optimistically) that she's been "nerfed" because the game mechanics changed.
At least, in theory. Again, we need actual tournament results to get a better sense of what these changes mean for the cast; but until proven otherwise this means heavies have a much easier time approaching shielded opponents. With that said, heavy vs heavy fights will be...
weird.