An Avengers Mansion for X-Men heroes that only triggers half your turns but is half the cost (ok 60%). And that half of turns is only if you are flipping between hero and alter ego every turn. Some heroes like Cyclops and Colossus are happy to do that, but others that don't get much benefit from alter ego form might trigger Moira even less. Moira is definitely on the slower side, but card draw is always powerful, and Moira is cheap enough that you can probably play something else the same turn you play her to not fall too far behind.

Where Moira clearly shines is multiplayer, as even in 2-player you can get her to trigger every turn if both players are opposite forms. In a 3 or 4 player game, she should be almost guaranteed to trigger every turn, making her way better than Avengers Mansion. Between cards like Moira, The X-Jet, Danger Room, and X-Mansion, multiplayer X-Men teams are far stronger than the sum of their parts.

This is another of those cards that I think needs to be revisited with more recent synergies.

When Moira was released, she could draw an extra card every couple turns in single-player. This is still the case in Leadership and Aggression. However, Protection and Justice have some new tools to let you consistently go alter-ego practically every turn. These are Ready for a Fight and Entrapment. Both of which let you end your turn in alter-ego and change forms during the villain turn. Both of these are Preparations, letting you use Practiced Plan to reuse them, functionally giving you up to six copies.

While those cards are technically 2-ER, the fact you're ending your turn in alter-ego makes them functionally 1-ER (or zero in the case of Colossus or Psylocke since their alter-ego hand size is 2 more than their hero form.) If any X-Men or X-Force characters are using Ready For A Fight or Entrapment, Moira should be an auto-include. In those decks, she practically is just a much cheaper Avengers Mansion.