They have the least variance between forms and a least for PVE have similar capabilities. In my opinion, Cheetah is a lot better than the rest of the util forms PVP, but that doesn't make the rest of them bad, it just makes cheetah really, really, really good. The main thing you are getting from air is mobility and a bit of kill sealing ability, which they all have to some degree or another.
With defense, offense, and water you really have no idea what your capabilities will be or what play style you need to use until you get your final form.
Edited 2 time(s). Last edit at 07/27/2016 10:47PM by Zruulg.