There's Ygnas, and then far, far below Ygnas are the other trust healers. It's not "skipping to the best stuff", it's more like the difference between using Sparks gear and getting, say, the new Lv119 gear. There's a huge noticeable difference. It wouldn't be so bad, if the gap weren't so absurdly big between Ygnas and the other healers.
Kupipi blows her MP in 2 fights casting Paralyze and Slow (and usually gets resisted so she keeps retrying) and has no MP recovery outside of Starlight/Moonlight.
Apururu (UC) will let you die because she wants to maintain Stoneskin 100% of the time and is oftentimes casting it while people are dying.
Cherukiki loves Regen and won't keep anybody alive because she relies on it like a crutch.
Mihli is subbing /war (IIRC?) and is the classic melee WHM that will run out of MP faster than Kupipi because she doesn't even use MP WS.
That just leaves Yoran-Oran and that other UC guy from Sandy, and that Galka... the Galka I'm pretty sure would have the same problem as Mihli, but worse (because he's a Galka..) and the UC guy from Sandy, I remember there being a problem I was reading about with him, I don't recall.
Yoran-Oran seems to be the only 'decent' choice, but even he doesn't sound like he comes even close to Ygnas.
Your Healer trust is pretty freaking important. To lock the only good one that's a full 100% healer and not trying to multitask behind such a long ridiculous grind that is time-gated is just absurd. If the gap between Ygnas and the other healers wasn't so large, or if Ygnas had been anything other than a healer, this wouldn't be as big of an issue, but yanno...
In fact, when asked about "Why do all the healer trusts suck?", SE's response was "Get Ygnas".
*sigh*
Yeah, just like that, "Get Ygnas". Let alone that there's a minimum of what again, 6 months of time-gate grind before you can even try to do that?