I lean to agree with about 90% of this, Healers are in a terrible place but not so pronounced as tanks were in 4.0. Currently yea healer kits are very simplified but that has a lot more to do with the way damage occurs in content. The way content handles damage no there's generally not a need to constantly be healing and so a lot of our time is filled with spamming our one trick DPS button and keeping a dot up. Old AST card system will almost certainly never return, we could get slightly more variety in t he cards but due to balancing issues and their goal to prevent strong metas from forming its not likely. I digress, you could make Geo a Healer that has a different execution of the same or similar elements to WHM, but why would you when you have options for a more unique healer and can place Geo to function in a unique DPS position, like the Dancer of Casters DPS. That's not to say it can't be a healer it is more like if you have 2 job options for a new healer and have one that is 20% similar to WHM and 5% similar to WHM, then go with the 5% unless you feasible can't. I'd be completely Fine getting Geomancer DPS and an Onmyuji healer that'd be cool for sure, though I still want Chemist/Medic more.

Side Note: I know 0 Astro who want old cards back, I'll admit sometimes the current card set is less interesting but it is substantially better mechanically.