No I think it's fine. The current list of companions is awesome as is. Maybe a dragonborn would have been nice but really not an issue for me. But I don't really care for the very short type or races like gnomes, dwarves, and halflings...if any of those were possible companions they'd never get to leave camp in my playthroughs. Githyanki is probably my favorite D&D race which was a huge draw for me when they first revealed the game. If anything I would have liked a second Githyanki companion. I think Lae'zel may well end up being one of the most memorable companions in any RPG.