Opened this from my box the other day. I really don't like the mirror theme for TNG chases, since they never appeared outside of the books that I never read. Now that I have it, what am I going to do with this? Well, if we assume I'm going to use it instead of trade it, I can see the following:
We have a pretty standard penetrating attacker with his own little Q ability. That dice-storage ability is freaking valuable! Shape Change and Mastermind makes this actually pretty rough to take down. The Ruler keyword has some good candidates for Mastermind fodder, such as Hela, Shredder, Black Panther, probably many more. Opportunistic Maneuver is kind of retaliation-lite, but shutting down Perplex can be extremely handy!

One major negative for this piece is how important every piece of health is. He gets significantly worse with each click, although the last one is actually kind of ok (Hypersonic Precision Strike is actually useful). You really need him to stay on click 1 to get the most use. Taking one damage means he loses 1 speed for Running Shot and 1 attack (going from 18 to 17 defense doesn't mean anything anymore). Taking one more, he loses penetrating damage, has to rely on blades for anything significant, and can't pass off hits anymore, will probably die to a single attack. Click 4 is absolutely suicidal, turning him into strictly a support piece by his Q-ish power. He gets a little more threatening potential on click 5, but loses the crucial damage power. By click 6, ok he can be a little pesky. At no point does he have Willpower, so you are definitely going to alternate turns with him.

I'll feel ok playing him on a Ruler team if I can get some disposable units. Obviously he does better with his other mirror people, but I hate Chase themes which do that. Come to think of it, there might be a little something through Earth X Enforcers, maybe. Picard really needs a particular team to work, but he can find his place.

Advancing through the ranks with him is pretty weak. Not many options to mastermind too either. Falls to 2 and 1 damage very fast on his middle and late clicks. The die replacement is awesome but the rest of the dial kinda sucks for 100pts.