Burmecians would still be a good playable race

[MikkoAkure]

I think they would be around the height of female Au Ra and shorter Miqo'te.

Burmecians are a smidge taller than the human characters in FFIX. It would be awkward to make them smaller, let alone lalafell sized. Viera got ported into the game with the correct size.

Ivalician Moogles would be cool but I don't know how they'd be introduced to the game. If they ever were to add another race to the game I'd want a smaller one though.