Yea that's under the assumption that it's dangerous. I mean if his grab comes out like Walking Corpse then obviously it'll be easy to stuff lol. But if that grab comes out as quick as the choke grab from the trailer did then that'll be a huge problem in some scenarios.
If he has a 3 hit string where the 2nd and 3rd hits end at anything reasonable on block, say -4, jumping would be a guess only, not a reaction in some cases. If he cancelled after the 2nd hit before the 3rd what would you do? See the cancel, and react in time to jump over the grab? Mid string in the midst of expecting a 3rd blocked hit? That wouldn't be realistic option. You'd have to hold block expecting to block the 2nd hit or hold jump expecting a cancel, but you can't
react to either that fast. You'd have to chance jumping or blocking.
It definitely depends on the frames, and even if it was a big enough gap to react at the end of a string or in neutral, which is very possible, at best you'd be completely blind guessing mid string. That's the part that makes him uber scary if the cancel connects directly.
*This is making me want to play him if it connects.