To anyone saying tanks feel like they just DPS now, it's been like that for years now.
In a similar vein anyone saying enmity is a joke now: it already kind of was in Stormblood. Dungeon mob? Couple of enmity AOEs and you've got them. Any boss? 1 or 2 aggro combos and switch to DPS stance, which was also a lot more engaging stance to be in anyway. We did lose Diversion and aggrodump skills but we also lost the compulsory pre-pull diversion & dump on cooldown. When you have buttons everyone is pressing like that you might as well streamline the process and get rid of them similar to the situation we used to have with protect.
The only time aggro really needed any managing was if the tank was behind on gear or you had people who didn't use those aforementioned skills for whatever reason. The only downside to losing any of this is not being able to see shirk-trolling in NESTs videos anymore and that's really it.
The easy way to handle aggro management in anything below extremes and savages was to keep your tank stance on all the time and funnily enough that is exactly what you do now too. You just don't have to deal with situations like not being able to use blood weapon because Mr. Midare over there is limiting your possibilities by not using diversion. What you have now as a norm is what you always hoping you'd see more in SB: a situation where you can freely use all your abilities without worrying about aggrocombos or stancedancing.
Healers are getting more recognizion now. New tank and no new healer + healers getting kinda shafted means that role is a lot more in demand now. You say tanking is easy and simplified and that anyone can do it now but in the very same post you say you see a lot of horrible tanks. Also, the devs have always allowed you to play whatever you wanted and it's not like a lot of jobs in other roles didn't get streamlined too.