What you said about A3 not being able to pass Capcpom's QA could also apply to A2, CVS2, 3S, CVS1.....and they all did get patched with CVS2 being the exception, it probably would have gotten a revision if license didn't expired.
A2 Gold: cc damage nerf, valle cc removed, alpha counter meter cost increase. Overall character nerfs.
A3 Upper: couch cancelled removed, V-ism invul shortened, V-ism damage nerfed, A-ism super damage increased. Overall character nerfs
3S revision B, dreamcast version: Unblockable removed, Chun nerfed
CVS1 Pro: Juggle system changed, ratio system changed, overall character nerfs.
They're out there but no one plays them because they rejected the updates. At least in North America, I see Japan playing A2 gold over A2 and CVS1 pro over CVS1 on Mikado's ustream channel all the time.
Back when SSF4 came out, I was hoping all the top player rejected the game like all the previous street fighter updates especially since it was a console only update......sadly it didn't happen