Those people are going to scream that parsers are the problem already, if you make something idiotproof then someone will build a better idiot. Enrage timers are the least of my concern and certain jobs are designed like trash because they change dramatically at several level ranges but SE is a small indie studio so they can't spare the resources to streamline the jobs from 1 to cap despite the fact that several jobs are in need of it. But, you're again giving credit to the idea that there's these imaginary boogeymen who are going to jump on someone for pulling slightly less DPS in Sastasha.
I've never met a single RDM do that, so I can't even fathom that. I mean hell I pull massive amounts of mobs in content like Toto-Rak and such because it's easy and it's still quicker, these are problems that don't exist, you just don't pull as wildly if there isn't AoE skills. This has nothing to do with parsers, this has everything to do with dungeons being boring slogs and jobs not getting essential skills until you're almost at level cap or at cap. What you're telling me is that the community is fundamentally incapable of being trusted with this knowledge because of a few bad eggs and if we're going to throw out the batch because of a few bad eggs then I guess we're going to get more threads of people demanding they stop making Savage/Ultimate because it isn't their kind of content since nobody will improve, so they'll try to drag it down to their level.
FFXIV is a paradox of a game, they hide information from you, their rotations are lengthy, there's a TIME LIMIT on how long you have to do dungeons BUT you're still expected to treat it as a casual experience when it's impossible to educate someone on their class because their rotation is like 25 buttons with intricate details like oGCDs. You know what is a good source of toxicity? That timer, if I have to reapply Protect or I see like 60 minutes remaining on the duty list, that makes me feel awful and it lets me know that people are severely screwing up or not trying.
The game will have to dumb down the rotations if they want to really stop the toxicity between "for fun" and "for not doing this dungeon any longer than I have to" players.