I'm not a healer main but trying to understand my healers thoughts on why they are upset. After reviewing and thinking as critically as I can, I can only arrive at the conclusion that it's really not all that bad - more or less it's just that people expected something different.
Much like the tanks got homogonized treatment in their CD rotation, healers got homogenized in their dps. They pretty much all have one dot, one spam and one aoe. They all do basically the same base potency with whm edging ahead, and I assume that AST lags a bit behind because of their slightly faster cast time? Either way, it is a dumbing down in a way but also balancing them in that aspect. It hurt SCH the most, but I think they will be OK outside of possible MP drain being too high if they want to spread Bio around before spamming Art of War.
Otherwise, AST healing kit itself is mostly unchanged or upgraded. Cards were simplified, as most people have stated you were always trying to draw balances anyways so now they'll be crapping them out left and right and get to manage seals or whatever else instead. It's not the end of the world.
Outside of obvious complaints about SCH being stripped of it's DPS kit, I think WHM has the next most to complain about. The 2 new heals should've been off the GCD. The charge time for lillies is 30 seconds anyways, just make them 30 sec CDs and it'd probably solve most if not all WHM complaints, at least a major one. Quite honestly I don't see why they haven't done something to consolidate the cures & medicas like most other 1-2-3 abilities get upgraded. I'm sure there's some logic behind it, but I haven't spent enough time on healers to know one way or the other. It's getting into a different topic altogether, but seems like it could be loosely related if it allowed to them to add other types of heals or support abilities.
In hindsight, it might've been better for DNC to be a healer because it would've allowed (or perhaps forced) them to make more interesting utility kits for the other healers to compete. Since they decided to make it a DPS, it seems reasonable to assume they didn't want people stacking DNC buffs with AST buffs and so forth, so they just gave them all to DNC instead. I'm not saying that's a good choice, but it's a somewhat logical conclusion to arrive at if we are just looking at the facts.
I don't know. At the end of the day people have the right to voice their opinion about job changes, especially jobs they have mained for years. From the outsider perspective that I have, it doesn't seem unreasonable to assume most of these problems can be worked out with a few minor changes. Just gotta stay persistent.