The current ending feels like a bit of a shortcut. I could easily envision the game opening up at this point instead, having you gather support of many named characters in preparation for the final confrontation. Perhaps even a full takeover instead of escape, and maybe even let the good captain have a few turns in... The Pear Wiggler.
Although that wouldn't be a Tavi ending now, would it? That would be an Everyone ending. Here's to hoping that every major character eventually gets an ending they deserve, because that would be awesome.