Hi,
Blizzard, can you please make Sentient Slime into Allied Race? We are seeing these guys all the way from Vanilla and they already have weapon models matching them, as well as significant presence in various key lore locations.
Proposed classes should be Warrior and Hunter because they shown affinity with weapons and arrows, it will also be easy to implement quiver models. Rogues may be possible too, as some Slimes can blend in environment and daggers are potentially carried too. Some Slimes seem seem also to be proficient with Shadow magic, so consider Slime Warlocks and Slime Priests. Slime Monks of course should be added, as their ability to shift their bodies is reminiscent of body mastery of Monks.
As for customization features, I suggest skulls of several races as well as goo color - green, grey and red and their hues. Since Slime can technically take forms, it should be easy to have current armor matched to them... or rather them to the armor.
This is an example of how it can be done - take note, the usual WoW issue with Armor clipping would only enhance the immersion further with Sentient Slime allied race!
Additional official images.