I thought he wouldn't be in because his only realistic moveset options were punching, dodging, countering, and moving quickly.
But now he's in with a moveset consisting of punching, dodging, countering, moving quickly, and a gimmicky free KO super punch, with a "bad" air game to try and balance that.
I didn't want him in, but the trailer was neat and he actually looks pretty fun, I've always been a fan of characters that jump right into a fight rather than long ranged/projectile attacks, and Mac literally jumps in to fights. I think his KO Uppercut punch is a bit ridiculous tho, I know he doesn't have access to it at all times, that meter better build up slowly...I feel that move was added because people thought like I did; "If he's in his moveset will be limited and lame" and I can say even without the KO Punch, he looks pretty fun so they did a good job with that.