More people pushing it = faster would be a big buff to certain classes, whm and warrior being two of them. Idk about you but those are two classes that I don't think need a buff.

The crystal speed up mechanic isn't a catch up mechanic, it's a tiebreaker. If you didn't push the crystal to goal in the time limit, you don't deserve the win yet. If you have the better team, you won't let them push you all the way back from 98%. I'll agree that it doesn't feel great when that does happen, but I definitely see the necessity of it.