These statements are honestly just not true
Their party buff averages about the same contribution as battle litany looking at logs. Random example where you can check https://www.fflogs.com/reports/RpvNf...pe=damage-done
Arcane circle contributes 20 dps less than battle litany, if you go and look at more examples you'll see generally the same trend in performance.
Arcane crest is absolutely overpowered, its the best utility skill except red mage's instant rez, if properly used reaper heals more than some tanks, it is really insane, especially when you compare it to what other melees have, which is nothing in most cases and then mantra for monk, which is not even close to as good as this. Just take a step back for a second and compare dragoon's "defensive" life surge, and arcane crest, if you still consider their utility very light idk what to tell you
Random logs for example
https://www.fflogs.com/reports/XbA2B...aling&source=4
https://www.fflogs.com/reports/9r8R6...ing&source=783
https://www.fflogs.com/zone/rankings...=DPS&boss=1059
Reaper is insanely overpowered at the moment, the fact that they have the best damage and utility while being easy to play is just insane, no weakness whatsoever.
Side note, reaper getting nerfed would be good probably not just for the health of the game, but also for the reaper playerbase, seeing as they are the most popular class by a longshot and probably still will be because of fantasy/playstyle/animations, trying to get into a group/static as reaper is harder than as any other class right now, making it so the job is not literally the best at everything would help, at least somewhat.
I also think it would be easier to nerf reaper than to buff every other job, if they keep that insane utility and damage there is no point in bringing other melees.
Just for a quick comparison with my other most played class, dragoon, dragoon currently has more positionals, more animation locks, a busier rotation overall (look at casts per minute and reaper is the lowest among melee dps), no defensive skill whatsoever, nevermind a partywide one, and their party dps buffs are barely better than reaper's while doing drastically less personal dps, i dont think you can in good conscience look at everything available and think reaper is currently balanced.