Ironically it improved on some of the issues that plagued its contemporaries, like the netcode. I don't think I've ever had a game I was more disappointed with, but wanted to succeed. The fact they finally added X AND Sigma into MvC is pretty much everything I wanted since as late as MvC3, but they had to shit the bed with everything else except for the basic nuts and bolts of the FG mechanics.
MvCI couldn't have come out at a worse time. Then again, I think everyone really just wants MvC4 with the Smash Bros. Infinite life cycle plan.
Speaking of Smash and the thread topic, I wanna see Sparkster make a comeback. Contra's getting a new game, so maybe's there's some hope for other dead Konami franchises.