The gems aren't a replacement for assists, they're a groove system / replacement for X factor, the free form tag is a replacement for assists. The tag isn't opposite of new friendly, assists were. Tags are much easier to keep track of and understand in comparison to assists where you have to pick one of 3 (which don't have descriptions) then in battle you have to try and call them randomly in a trial and error to see what assists are good and do what. Then of course there's the concept of assist punishing which leads to noobs never using assists because knowing how to call them properly isn't something the game teaches at all. The tag on the other hand is simple, as the player knows exactly what is going to happen every time they hit that button. My 12 year old brother who hated umvc3 because "it's hard and complicated" was playing the MVCI demo and he was tagging mid
combo like a mother fucker.
The tag simultaneously lowered the necessary skill floor while raising the skill ceiling