Originally Posted by
wolfen
While, I do agree to see four legged races in azeroth, like you would, unlike the children of Cenarius, who are all basically druids, so a shapeshift function to a 2 legged, or snake, form is not that hard to perceive, as it is apart of them. But to make it... rp friendly, they would need to make two models, one four legged, and one two legged, but nearly identical to eachother.
Now, Mantid, being two legged, could be simply added, like any old race, besides the lore going out the window. The only reason the Paragon of the Klaxxi are with the Horde, is because Yshaarj is there, and Garrosh is his speaker. Otherwise, they are by themselves, uncaring who or what you are. You are told this multiple times through the klaxxi quests, and even told to be disposed of multiple times. Besides lore, Mantid can easily be added as a race, thanks to them being bipedal praying mantises. Some female designs would need to be made of the "warrior" class.
Now Nerubians have all been spiderlike, and unlike the lore for a shapeshifting Children of Cenarius, they are stuck in their spiderlike form, making mounting on ground mounts impossible. For air mounts, it would be a simple web harness dangling from flying mount. I would say limit them to the larger dragons, but you see bulky taurens flying on the small horsemen and wyvern mounts, so physics are not the problem. The problem though simply lies in the ground mount, which you cannot mount up for, not even the web harness being dragged, as then we are just into a land where its stupid. While naga could mount Side Saddle, The Children of Cenarius could Shapeshift, and the Warrior class of the Mantids are all bipedal, Nerubians would not be able to mount ground mounts, Minimum.