Think it would be nice if you got rewards for winning tournaments besides cash, which becomes useless after a few lvls. Perhaps giving, say, 30 of each type of pack to the winner, 20 for 2nd place, 15 for 3rd, etc, etc.
There's really no reward for winning tournaments, but the trophy itself. Think it would engage players more into trying to win tournaments and demotivate "tanking" (losing on purpose to stay in the same level and use all tokens saved to make a super team).