It's interesting that there hasn't been a review of Domino here yet, considering how long Next Evolution has been out; and how unique her mechanics are. It's probably a case of her being overshadowed by the more obviously-powerful Cable; but she can be very rewarding to play in her own way.
Domino introduced a unique deck-milling style of play to the game. It's not always the strongest, and it can be complex in terms of decision making. But when you pull it off well, it's a very rewarding gameplay loop.
At first glance, her stats aren't amazing. Only 9hp and 3Rec makes her seem very squishy. She has the standard 6/5 hand size, and the same 1/2/3 stat line as the likes of Peter Parker Spider-Man. But it's her special abilities - and how they interact with the rest of her kit - that makes her shine.
The key to understanding her stats - and seeing how her kit works in general - can be found by looking at the card Probability Field. This upgrade doesn't exhaust for its effect - don't make that mistake - and means that you discard a card from her deck every time you use a basic power, adding its number of resources to the value of the power. If you are in hero form, you also double any wilds (though not in AE).
The upshot of this is that her stat line is somewhere between 2/3/4 and 4/5/6, with a recovery between 4 and 6. Most of the time - with a deck stacked with wilds and double resources - it'll be a 3/4/5 stat line. And with her ability to put cards on top of her deck, you'll know what the value is in advance. Readying can therefore be very strong for her, although she doesn't have it natively in her kit (the likes of Indomitable and Justice Served can be good value).
With only 9hp and multiple cards that are good in AE, she's a hero who likes to flip a lot; so Justice is a good aspect for her, or Protection with the Ready for a Fight build. She's also a character who benefits a lot from a very built-out board state, so those control type decks are favoured even more.
Tbh though, you'll often have a lot of basic cards in her deck, to maximize her abilities. So the space for aspect cards is often small - they're a sprinkle of flavour, rather than the main dish. That's probably the biggest downside of her archetype. It leans heavily into her hero kit, meaning her builds can be same-y unless you intentionally fight against that.
Overall though, she's a very rewarding character to pilot. If you want Magik-style complex decisions but handled in a very different way, Domino is worth a shot.