I like the AI in ST way more than in HD Remix. I think the computer is too easy in Remix mode, even when you play it on expert level. On the other hand, Akuma in easy mode is not easy at all ;p
I noticed some changes tho… When you are playing against the computer in Remix:
Chun-Li’s SBK is different. She spins faster and longer and is higher in the air. She also still has her mk flip kick.
Ryu has no recovery while doing his fireballs. I was like wtf?!!