You should do less raw punch walks and, instead, cancel it from your normals. That way you give the opponent another mixup to think about in d.1/d.3 PW , d.1/d.3 command grab or d.1/d.3 hit confirm into b.21u.2 if you're close or 21 if you're far.
Something I've figured out is when ppl try to jump over you constantly like that Sub was doing, just EX stomp. They have to wait until they're pretty deep to press a button or it'll whiff, so you have enough time to react and punish.
Last, you should be using f.3 and d.4 more. They're really good pokes and f.3 combos on hit into PW and is also a very good meaty.