Paladin doesn't really Suit "life steal" I don't think magic attacks should have sustain tied to them, It's sort of "odd" that Paladin has so much life steal.

If we remove it but make clemency more effective in all Situations, we can Lower PLD's Sustain but also make it more fitting & more versatile, heck you could even make a *weaker* eariler version of clemency so that PLD has some small sustain in early content

I think its Absurd, that warrior is more of a "target/group healer" tank then Paladin, Nascent flash is strictly stronger then intervention even giving you the heal effects, Shake it off gives out a AOE regen ect, While PLD is the selfish life stealing tank with more then half of its sustain tied to rotational attacks.

I also think healer's get upset when anyone suggests healing extra healing tools on other jobs because currently certain tanks have too much of it, Ideally tanks should have utility (some that can be shielding and healing), But it shouldn't come at the cost of making healers feel useless, I think it's also "deeper" then tank sustain. Personally I like the Idea of working together with my healer to keep me and the group alive, I want tanks to have strong support like they do currently, I just also want healers to feel like they aren't invalid.

To make Healers more fun and Important (this would also make tanks more fun for me) *Note that I'm not advocating for all these changes just to a sense where healing becomes more Important in fights.
1) Add more damage to auto attacks, Lower tanks base defensive value down (they will take more damage, but keep the same strong CD's so CD timing becomes more important)
2) More Aoe damage and out going damage.
3) Remove "AOE per hit sustain" aka bloodwhetting healing per enemy (I'd also remove Abyssal drain and give some weak life steal effect to oblation)
4) More importance on GCD healing actions as this adds decision making, I think healers are overbloated with way too many ogcd heals, tank/dps Utility should save some gcds instead of replace the healers entirely.
5) More Procs or varied damage buttons, I don't think healers should get a "1, 2, 3" or a "rotation" but they should get more damage buttons