I feel that would annoy a lot of people. They're not exactly the most well known race in the FF franchise and I imagine even the most die-hard FFXII fan forgets the Rev are even a thing (since they're
almost as rare as male Viera. We only see two every 42 hours in the story, right?). Ronso, or the concept art for FFXI's Galka (yes, they could have been
lionmen), or something new entirely are the most likely 'lion-like' race.
Still would prefer Lupin, or something that already exists on FFXIV and not something left for the absolute last second
again. Heck, make the Bangaa playable. I know people would absolutely love them to be playable (not a fan of their XII design, but hey. They're more well known/popular than the Rev).