Actually, the plant costume is very faithful to the finales of most stage versions and the ending of the original black and white Little Shop of Horrors. During the final song the four main victims (Mushnik, Audrey, Orin, and Seymour) all come out to sing "Don't Feed the Plants" with plant heads over their own. In the original movie, at the end, the plant bloomed into all of the faces of the people it had eaten
So, in my opinion, the plant guy looks great! The rest of the series is just your average monsters so far, but I'm excited to see what else is in store