Rival Wings is so much more fun than Frontlines, not least of which because its a fair 1v1 instead of a 1v1v1 free for all where you have a 66% chance of losing. Rival Wings is always active during the moogle treasure trove event because people actually like playing it and it has a good reward attached. If they don't add it to Daily Challenge or give it its own daily reward, its going to die no matter what they do to the actual game mode. I hate having to organize with discord to get matches or just wait until the end of a patch because they have refused to give it a decent incentive for queuing for it over a Frontline daily challenge.