I'm finding that the drawback for the green die isn't really all that great. This, considering that the green die is 2-3% better in successes (including multiple successes) than the red die on almost all permutations.
The current drawback of the green die is that the GM can stick a 1 recharge on any one of your currently recharging cards. Meh. Once a person has 4-5 cards, this is pretty much moot.
What other options could be available?
jh