I'm all for removing unnecessary skills on Tanks and DPS, so long as it doesn't compromise their ability to perform their job but since I'm primarily a healer main, I can't really give suggestions on those topics (although Six Sided Star and Anatman on MNK would be my 1st suggestion to go). I wouldn't put a Tank main in charge of DPS changes, a DPS main in charge of Healer changes and a Healer main in charge of Tank changes because that's doomed to end in disaster.
I don't really see a point in half of the healer skills that we've gotten over the years.
What's the point of Fey Blessing when it only heals for about as much as a Regen tic?
What's the point of Solace and Rapture when Cure 2 and Medica already existed?
What's the point of removing old skills like Divine Seal, only to reintroduce them again under a new coat of paint such as Temperance instead of just upgrading it like they've done with every version of Stone/Glare, Broil, Malefic, etc?
As for the priceless thing, I don't believe that for a second. On the odd occasion I felt masochistic enough to do Roulettes on my PLD, I was more than capable of carrying groups long after the healer went down and it often didn't matter the roulette.
Any dungeon content? Liberal use of Clemency on big hits kept DPS alive, on top of any utility/mitigation I could throw up to supplement was more than adequate.
Normal Raids? Cleared every single Eden Raid with my PLD playing healer after both healers died on more than 1 occasion.
Alliance Raid? Unless a fight has an enrage mechanic, not really a problem there either.
A well played Tank can more than compensate for a Healer in 90% of content and I am NOT a great tank by any measure.
The reason why we're not happy playing a healer is because we remember a time when there was more to do as a Healer. We had multiple DoTs to manage and a small DPS rotation between those DoTs, Cleric Stance and our Nuke. We had to actually manage MP in the past. We had to actually use our GCDs for more than just Filler Spam. We needed to shield prey mechanics. We needed to rotate Virus/Disable between Healers to make sure the party didn't die to a massive raid wide. Nothing of that has been retained so we went from having a solid workload that actually felt rewarding to pull off to having our job outsourced to Tanks/DPS roles and having the bare minimum to do.
WE"RE BORED!!! It's that simple.