people hate on them because they are not mortal kombat. mortal kombat 4 was the last mortal kombat game, and even that's with an asterisk. like i've said, ed boon said-- in an old 1997 egm--that he was not going to put side-stepping in mk4, but he ended up putting it in. now, had he not put in side-stepping, mk4 would've been 2d mk (even with side-stepping, it's still, essentially, 2d, but mk4 was still a stretch for mk). anyway, as far as the 3d games: that was mk jumping the shark.
it's like, remember when bruce lee died, and because of the bruce lee void all these fake bruce lees (complete with different takes on his name) started popping up? they could do all of the bruce lee sound effects, and they copied his look and the style of his films, but they could never truly capture the essence of the real bruce lee. that's what 3d mk was like, and even to this day, mk9 is still aping mk1-umk3, but all the hokey charm is gone.