Good idea, the individual match-ups would be random so this would be fair to all players. This would help both high and low level players get more tokens as well as provide more teams in the Arena Queue. Players who are on more often are rewarded with the extra 10% bonus to experience, plus this sounds fun.

Also support for the idea of token bought items/token store. Would be nice additions to the game, although I don't believe this should impact individual rating.