I thought the same thing. Sub-zero's overhead is virtually unreactable at 19f, we don't need more of that.
Skarlet's lows are already unreactable and there is one that has massive range and its a combo starter, if one is trying to guard the overhead too much she can just check their legs as much as she needs or simply throw them if they are standing and crouching way too much.
Making the overhead faster than already is its going to break her neutral game instead which in the corner, and even midscreen with the massive range her low and overhead has its going to be the best ranged 50-50 in the game, even better than geras.
The parry thing its necessary because sometimes you make a read, you jump without nothing and you start to parry as you land and the opponent hits you before the parry activates.
Same goes in certain gaps or spaces in between during neutral and her parry just feels slower in general, so a 2 frames reduction would make the actual parry something to be feared. I know it has the advantage of decieving people with the block animation which is amazing, but still, i think it should have been at least two frames faster than what it is currently.
