I was thinking of maybe items like Dota2, but I really like the models I have and don't feel like I want to change them. The ranks were kinda cool when they came out. Now, they feel like time invested though and that's not good.
To a certain extent, the tanks are a good thing. They've help me focus on playing certain champs more often, thus getting more familiar and better with those champs. However, going forward ... I don't know. I'm not really interested in grinding out rewards for certain champs.
What makes LoL so much fun is that it's a game you want to play because the game is fun. The goal is to get better and win, not grind out rewards for time invested like MMOs force you to do.