That helps a little. But limiting to Gen 2 means that he definitely outspeeds Raynie (so each generation has a good and a bad), not like that matters. They are probably happy enough to get Yukiko go and just Sunny Day.
Yulie can break CD, but Mesa doesn't really have much to do turn 1 otherwise. Neither of them need to heal turn 1 since no one has come yet. Mesa ever needing to heal is not a positive though.
Uh...if someone wants to test Reflect stopping the MT status. Of course, no way I'll buy allies buffing you as the same as enemies buffing you in terms of countering barring specific in game proof.