^ Both Jax's 1,2 and his Gotcha Grab will whiff on crouching opponents, and his overheads are too slow. You can duck at any time during 1,2 xx GotchaGrab and the following hits will whiff. In fact, the only somewhat reliable string for hitting ducking opponents is the 2,f+2 string (the first hit whiffs on crouching opponents who aren't blocking >_>). f+4 will also hit them, but it is unfortunately a low that is predictably followed with Overhead Smash. (You can't even try to hit-confirm with the f+4,1 string because you cannot cancel the whiffed 1 into Overhead Smash if you realize the opponent has blocked the low.) Hell, using 2,1 xx Gotcha and 2,f+2,b+1 with some throws and Overhead Smashes thrown in would offer better pressure than 1,2 xx Gotcha spam, and even then, it's not very great pressure. The fact that you can fuzzy guard in this game doesn't exactly make it any easier to perform either. Also, where'd you get three times? That doesn't even make sense... 0_o Moves have the same recovery and blockstun (unless the opponent releases block early, I believe) regardless of how many times in a row you do them.
As far as zoning goes, the most Jax can do is use ground pound on zoners who are outside their optimal/safe range and using a slow-recovery projectile (e.g. Reptile's force ball). Now that he has EX Dash Punch, he can deal with zoners a bit more easily, but he remains primarily a close-range character. Hell, his zoning is even worse now that he can't even try throwing a projectile or two at Cage and the like because of all the armor on EX moves.
The only thing I might agree with is Ground Pound not being useless, but I haven't seen or used the new, patched Jax, so it may still be too slow of an option, even dash-cancelled.