It's definitely hard to punish/react to gun shot and on block you can't do anything about it.
Usually the only way it get iatU is if you get too greedy with your zoning(keep trying to zone at a disadvantage) , which would make your gun shot whiff or come out too late and get punished. Of course I'm not saying this is the only scenario where you can get a teleport uppercut on him.
I don't really zone Sektor with grenades, I sneak in some in on rare instances, but I mostly just play a strong spacing game against him.
Yeah, it's definitely not a big deal for Jade, she zones with her ranged normals/specials as opposed to her boomerangs, but definitely good info to know
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I play all the fishies except for Nightwolf and CSZ, I've played Baraka on and off, but moreso in the past week cause I wanted to drop Kitana and learn someone new.