Well I've never played an elezen, so can't say for certain, but I would imagine they wouldn't have any issues with clipping as they don't have any parts that would lend themselves to clipping. I used to play a lalafell with the pointiest ear type that slants upward and noticed that on some hats the tips of the ears would clip though, but I don't see you having that problem with the elezen as his ears go straight out and don't tilt up.

The clipping issue you've shown with your aura would definitely bother me. If that's the style of gear you like then I would say switch races.

Also, you've said that if you do decide to change you are going to use the fantasia that came with the collectors edition, so I'm not sure if you've gotten there yet, but you also get a free fantasia at the end of the ARR questline. So if you change to elezen and hate it, you can always change back with the second free fantasia.