Dispel help? :(

[Adrasteia]

If that was really the case, why wouldn't the cost be higher in the first place?

Poor design, mostly. WoW has also struggled on-and-off with this same issue for most of its life (see: Chromaggus), and has introduced greater costs to dispelling in an attempt to make it a more meaningful decision. The fact that there's so few debuffs to actually get rid of as we've progressed through 2.0, as you've said, is fairly good evidence that the designers aren't sure what to do with the whole debuff/dispel mechanic as it stands.

[Nadirah]

The willynilly dispels in wow got mana cost upped and an 8s CD on it.

All cures in EQ2 have a cast time and reuse timer. Cure curse is a 1 min timer.

[Werhusky]

Its not too unimportant to Dispel in T7 Allagan Venom or in Mog EX not Esunaed Bemoogled can cause wipes (makes me sick if people dont).
I dont have issues.... get used to the fights, noone expects you to understand all mechanics at first pull except some idiots.
Generally you anyway Focus Target the boss to see casts after that check partylist and see debuffs/buff try to esuna/leech. Trial and error. I even catch myself trying to Esuna stuff that I KNOW its nonesunable. In certain encouters you also know without cast they will come. Also tank has priority you usually have him on default target. Try, try, try.
Also take advice if someone tell you this or that is esunable and dont take it personal.
Good luck in getting comfy with Esuna

[Nutz]

Removing buffs/ debuffs barely happens in this game, as others have shown. It's probably not important given the state of things, but dispel is actually to remove buffs from an enemy, rather than removing debuffs from an ally (like leeches, esuna, and maybe sometime in the future erase). Doesn't really matter though because I think only MNK has a dispel ability and as expected it cannot be used anywhere that matters (in PvE).

[Risvertasashi]

If SE ever actually delivers on addons, we'll be able to customize the UI such as how things like how debuffs show up (and have it show which ones are esuna'able and not). Unfortunately, last I heard FFXIV addon support was going to come in a package deal with Half Life 3.

[KisaiTenshi]

Most of the debuffs are not worth your time removing because any debuff under 10 seconds that isn't paralyze or silence, doesn't affect the player's ability to do their job.

That said, esuna/leeches is best used to remove poison stacks, not single instances of poison. The game has both, and the latter is pointless to remove since they all tick down at the same rate, where as the single stack of X poison is literately the poison stacking due to multiple casts, so you can remove when it you can't heal through it.