Yea the new rewards ain't much exciting... I believe they calculated their stuff to keep a balance but it really doesn't feel the rewards are worth the effort...
A single TW yields better rewards for basically the same or even smaller amount of time than a single GA round. Even by considering the GA final rewards and GAC currency, since there are 3 rounds per GA and 4 GAC in a tournament (12 times the work of a TW), these rewards are really underwhelming.
I had fun and participated seriously in the first GAC, but since the leaderboards aren't tuned to really rank everyone in each division by their performance and because rewards are so low I might not participate as much in the next ones.