From my point of view, crossover are pure fanservice. CvT and MvC maybe are exceptions because neither Tatsunoko nor Marvel are fighting games, but for example SFxT looks horribly and wierd. Is not an SF, but is not a Tekken either and looks crazy. Like if was not a serious game but a just a gag. MvC looks in the same way, like a not serious game, just a crazy/broken/cheap/casual game where people get mad smashing buttons and canceling ultras. I know in terms of money and popularity these games are great, everybody was hyped for MvC and is hyped now for SFxT. They are very mainstream games that sell well. But in terms of quality I think they are dirty and cheap, and don't contribute to fighting games scene in the same good way that individual titles do (I mean no-corssovers). I always prefer play SF and Tekken like 2 games separately, not together.
So you say that you are fan a SC IV, yet for you mvc3 is a cheap/broken/button mashing game?
I'm not saying that SC IV is that kind of game, but honestly, this is as ridicolous as VF fans who said that tekken is a button masher, I mean sure, you can do fancy things just mashing buttons on MVC3, SC IV, and Tekken, but when you play with guys that know how to play, while you know how to play, you will see that isn't that broken, or that in fact, the broken system is what made the game (IT'S MAHVEL BABY!)
Now, I honestly don't understand this debate, I can't see how making a crossover defeats the purpose of create and standalone, I mean, we're in a friggin KOF forum, the game that was the versus of SNK back in the day, which later evolved, since always was an stand alone game. At this point the versus series is just an stand alone game, that was never designed for marvel you can replace spiderman with superman, and in the end, the game will be the same, just like if you pick SF IV and put marvel characters, the gameplay will be the same
SF vs Tekken is still SF IV to me, but just with some tweaks trying to ''make it feel more like tekken'' even though so far has garnered bad feedback, maybe because to begin both system should have never been mixed (Even though I will still give the benefit of the doubt) but so far, looks bad, I would have prefered to just use the SF iv system and put Tekken Characters, but at the same time, I hated CVS because it felts like a street fighter game just adding some SNK characters instead of feeling like a true crossover game, but I honestly believe that KOF and SF are too VERY different who should had never been mixed (would have been cool to see, I don't know, SF III featuring KOF, and KOF 98 featuring street fighter to say something, or maybe create a new system from zero) but if I had a hard time believing that KOF and SF should be mixed, I less think that SF vs Tekken should be mixed, just like will be retarded to mix blazblue with soul calibur, or virtua fighter with kof