I'd really want this in sc5:
Been screwing around a little with special versus the last few days to see what I've been ignoring for the past two years and found something I think it could go straight into normal play; the Charge Cancel skill. Basically you can cancel any move as soon as it hits, blocked or not, as long as you're on the ground AND got enough SG, as it costs a hefty amount of SG to do and cannot be done if you don't have enough.
The thing this does to the gameplay is pretty interesting imo. By sacrificing SG you can create combos that packs more punch, use it for pressure or to escape a punisher, etc. It's not that overpowered either as you put yourself in a lot worse defensive position because of the SG, coupled with that it, as is, likely cannot be used more than once per match. It also adds more strategy when choosing between repelling or parrying.
Also, a lot of moves and NC strings also transform into much more interesting tools, like minas 6AK, which suddenly can combo into a 3B combo, which imo is pretty significant for her.
Anyway, I recommend checking it out, even though it's special vs, because it's fun as heck to just toy around with.