I think it would work out just fine, the Zandalari already achieve that feeling when standing next to other races. It would have the same effect, but instead you will now tower over every single race. For fun you can test this out with their Legion model to see and also see if their running animation wouldn't feel off in terms of speed. It works fine and will make you feel large enough around other players, but also not feel ridiculously large at the same time. If it works around other players and achieve that feeling, I think there is not much of an issue there.