It is fascinating every time how some people are just against adding options to the game.
Seriously, if you don't want to play as a Garlean in case they add it, don't. Personally, I wouldn't either, but let others have their fun.

On topic, I think the EE screenshot Aveyond provided would give enough justification to add Garleans as a playable race or, as an easy to implement solution, a glamor item. The PC is already more than special, why not be a magic wielding Garlean?