This has nothing to do with class balancing/function/design.
-Purely Cosmetic-
Druids need some love in the visuals department. Can we get like a 10-25% increase to animal form sizes? Playing as a giant bear would be so much more appealing than the current Bear form. Same for Cat. Like seriously, why do hunters get these huge dinosaur pets and I'm stuck here dps'ing as a freaking house cat?
I know the druid models got an update fairly recently, but maybe make the forms larger or introduce some other animal forms.
For example: glyph of the cobra: take on the appearance of a snake while in cat form (Feral). Or maybe different alternative animal forms for each race such as:
Alliance races: Lion form (replaces cat), Owl (replaces (flight), Darnassus ancient (updated tree form)
Just some random examples, but my main complaint is that the animal forms are just too damn small! This is the main "gimmick," or calling-card if you will, of being a Druid! There are even quests in the game where you use an item to transform into essentially I giant feral druid.