I played all 3 healers and I can post healer main problems in ff 14:

- dungeons is way too easy even for casuals rly, if you want easy dungeons for story ok, but give us harder version of dungeons with 2x exp, 2x loot etc, or just M+ from wow ...
- healers are not healers actually they are hybrids dps/healer, how to solove this ? give us old cleric stance that can't be change in combat like astro stances but in exchange give us some cool buffs/debbufs/ccs

- in exchange of new cleric stance give us combo system same as dps have: for example you can't cast cure II 1st, for casting cure II you need cast cure I to proc cure II etc is just examples don't need to look exacly same ...

another mechanic would be combo cure I > cure II or cure I would be buffed like 50% mana cut or give 5-10% power attack to healed targed or armor or any buff (this is only example how healing combo would work)
combo would be cure I > cure 1 with buff > cure I with buff for healer like 10% healing power ETC

aoe combos would be medica > medica 2 with small party buff > medica again big party buff 80% mana cut etc (you could combo medica with medica II too etc,) or regen from whm 1st regen is normal one, 2nd regen heal faster more ticks , another regen would give some buff like barrier some kind etc is just random ideas not need to do same ...

we could use same system for buff combo too, there is shitload of possibilites

I would see that system on harder dungeon content similar to m+ from wow ...

another thing, don't make all 3 healers the same balance them but ... make 3 healers with diffrent skill cap: whm for begginers with small skill cap , sch for mid skill cap players , astro for veterans with big skill cap make more advanted healing combo for example and for whm make simple one ... but with same power

in this scenerio we would have healer for begginers and for veterans who would need more challenge and more fun and SE would be happy that could get new players and some old veterans would be happy too with harder class ...

before any of you tell hohoho but you don't do savage is harder version of trials ... yeah I don't do but I would like to make some m+ in ff 14 version, in wow I made +15-20 m+ in legion and it was rly fun as prot/holy paladin ...
and before you tell why we need debuffs or ccs they don't work for bosses !! - sure they won't but they would be rly fun in m+ environment for bigger pulls that would help party alive on some rly high levels !

I don't wanna talk on balance overall in this thread rly and im totally against on so big dps numbers on ANY heal