If anything, I realize in hindsight that I forgot a few still. I also have a few interesting power ideas for future card sets, if you're interested. They'd need balance (yet again :) ) but could still be interesting. Examples of passive powers for a set of girls:
1) Things like 'vampirism'; let's suppose dark girls have this power, then 50% of the healing they get from hearts is added to the attack power.
2) If (X) color is also on the field, all (Y) color gems get a 20% boost of attack (good to promote multicolor decks).
3) At the beginning of every turn, a single random gem changes to the color of the girl having said passive power (so, suppose a water girl has that power, it becomes a water gem).
Forgot another point that could be interesting: if three gems are matched, we get a second move, right? Up to three moves? I'd just put three moves in a given amount of time, regardless of if there's a match or not. That could allow for some interesting and creative plays and setups.
It's my pleasure to give the feedback, don't hesitate if anything turns up! Just glad to help!