I think it's really pretty (and I love
Star Wars, at least, the original 3 films and the new ones are/seem fun, the prequels sucked).
But much like I raise my eyebrows at the idea of calling a kid
Anakin, I wouldn't use
Leia.
Laia is just as pretty and a more useable option, imho. And doesn't have the '
Leah' meaning you dislike.
(My only exception is if I had had a daughter around the time
Carrie died, I would have been tempted (but might not have actually used) to use
Leia as a middle name as a kind of tribute.)