Burst has always been important to this game. Trick Attack influenced openers design as early as Heavensward. Jobs with weaker burst or asynchronous windows have been typically been sidelined in favor of ones with 60s or 120s recasts. They've tried all those other design iterations before around burst, and they've all resulted in relatively static raid compositions where the usual jobs dominated over entire expansions.

I can see the attraction in wanting to give healers some 'carry potential' as far as wipe recovery goes, but you risk creating fights that people end up clearing without actually understanding the mechanics for themselves, especially with some of the recent dps checks being so soft. Most people in PF know that if they overstate their progress the group will quickly disband if the team gets stuck before the stated progression wall. Don't worry about individual pulls or who does what mistake, focus on being extremely consistent in execution. Even if others are making mistakes, you will progress in PF if you are extremely consistent. Otherwise you will be the one to cause the wipe on that one pull where the stars align.

On the subject of ranged-only uptime, no thanks. Quick melee disengages on the other hand, are a lot of fun (AMR/AMRS provide some great examples of this), simply because you need to be clever about movement tools to minimize downtime, and there's an element of danger around whether you squeeze that last GCD in or not.