Isn't half the problem that the creator of SF has left Capcom? I would think that is a big issue. I didn't even bother playing capcom Fighting Jam cos I heard it was rubbish.
I think that SF III third strike was the climax of the 2d SF series. I mean the old SF II games were good, but once SSF II Turbo came out it was really getting repeatitive. SF III's were good in my eyes, but I think Capcom need to build on third strike... I wasn't too fond of taking SF into the realms of the EX games, it just didn't work.