Just remove healers.

[IkaraGreydancer]

Healers being "redundant or "useless" depends on the party. I won't claim whether its,good or bad design but as someone else stated there will always be someone messing up somewhere. If you feel you want to play the game without healers I say go for it. Most other players will opt to keep em in their groups as per design.

You give healers more dps option they just become green dps (in which id imagine the next point will be "why not just play a dps"). They nerf tank survivability you end up with upset tank mains.
Idk, I don't see a clear cut path

[WaxSw]

Most other players will opt to keep em in their groups as per design

I'm willing to bet this is just because the game forces you to have healers via matchmaking and you can only go into non-standard healer runs with a full premade which not every player has access to most of the time, same with high end duty, outside of prog the main reason why 2 healers are brought instead of just 1 or none at all is either healer targeted mechanics (so 1 healer less would make that much more inconsistent) and ironically fflogs as 1/0 healers are deemed non-standard

You give healers more dps option they just become green dps (in which id imagine the next point will be "why not just play a dps")

We ARE already green dps, our GCDs are over 90% of the time used for that goal and our total healing casts barely reach 40% of our total actions, the only real difference that an actual rotation would make is that instead of pressing the same button 144 times that count could be reduced to 70 and the remaining 74 casts used in more interesting and fun options