Okay, that's it. I demand that SE reimplement path companions. Mine has to look like this.
As much as I panned 1.0 for being the weird thing that it was, aesthetics don't have much of anything to do with why the risks taken with 1.0 caused it to flop (among other things, like that game being horribly incomplete). The point of races is that there's supposed to be some sort of diversity. The current 5 races cover the basics (and even then miqo'te have rubbed people the wrong way due to their being more human-like than FFXI's mithra).
As pretty as they are, Au ra are really just normal-sized humans with cosplay parts glued on to their bodies with the option of full body paint. It's not gonna sink the game in any way, but it displays a limit self-imposed by the developers.
The clawed hands would simply mean certain gloves wouldn't fully cover their hands (sort of how trolls in WoW have bare feet regardless of footwear; a rule that also applies to tauren, draenei and pandaren).To be honest the other reason is probably that creating a new race that matches what we see in the concept art probably would have taken a lot more work than the Au Ra did. Those clawed hands, for example, would take a lot more customisation of current armour designs to accommodate for.