I used a grappler but ended up evolving to a striker right away as I found out you couldn't really cheese the ground game anymore (which is good, but... bad
).
What is your stance on overtraining? I had a lot of spare time as scouting an opponent is pointless when you're facing 1/2* fighters in WFA, and I kept sparring. Only once did I get a message my stats were declining or something. I couldn't read it as it popped up just before I pressed a button (which is what happens if you're pressed for time). If your stats regularly decline it still seems like a good deal to me. Your move stats will never decline and you can level up a lot of moves before you hit the UFC.
It sucks that they removed TUF from the game. That was always my favorite road to the UFC, especially in UFC2. If it was implemented like in UFC3, they might as well remove it indeed so I'm not that disappointed.