So about Balance.

[BloodRubyXII]

Machinist is really good in Rival Wings flame thrower in start of mid fight is super useful and the knockback can knock ppl out from edges that is usually a one shot move.

The only healer that needs to be tuned down abit id say is Astro good Astros are a fucking nightmare to play against. If you are a good healer in feast you wont have any problem to climb the rankings in feast because the carry potenial is so much higher then the other jobs.
Still not many ppl seem to play Healer at least on Chaos Data Center.

No-one wants to play Feast period lol. I mean without queueing at certain times or just outright win-trading, you don't get games and 5 button smash is boring anyway. Last reset no-one in the top 10 queued. At all. There's no decay, so people don't have an incentive to queue once they have the rewards, which means it's dead after a few weeks. Why would anyone be attracted by the prospect of being a part of that? It's not just an issue on Chaos. Even the JP DCs aren't doing so well for PvP activity anymore.