Op here. Great points. Maggie could be a great twist. Matt's just starting to acknowledge that he can't tough his way through this. He's starting to make progress, then bam, someone digs Maggie out of the woodwork.

And what if Bucky had been in the tower for a while. Everyone's been helping him recover which is part of how they're so good at it. Bucky keeps away from Matt because he doesn't want to upset his recovery, then Matt gets in danger and Bucky leaps in as his extremely protective attack dog.

Or something else. I don't want to dictate too much of this story for the potential author. There are so many ways this angsty journey could go, and I'm sure any of them would be good.