Certainly everything in moderation. I want to stress I was talking about role actions though, like not "sentinel vs vengeance" but like Rampart. The tanks are in a pretty nice spot in where you can play any tank you want yet they have a different vibe from each other in terms of play.
On role actions though- Rampart is the exact same name, animation, and stats for all tanks. Sentinel and Vengeance while preeeeettttyyyy similar still differ in some ways (obviously vengeance being better here, but those differences add flare to each job while not being 'unbalance-able'). Other skills like that differ sometimes more (like clemency vs aurora vs nascent flash). I would prefer that all the role actions get parsed into their jobs, even if they end up being preeettttyy similar. That's all.
So like lets say Low Blow, the stun for each tank, rather Paladin just keeps Shield Bash (with some changes for balance), Dark Knight gets Low Blow, Warrior gets Threatening Shout, and Gun Breaker gets Sundog (or something lol). Each stun while roughly offering some similar concepts would have their own twists, sometimes that'd just be name and animation other times it would be more. Like for each you could imagine twists that make them similar in the pinch scenarios that demand closer balance yet in a general aspect have their own sort of flare (like the tank's cures vs the tank's dashes, etc).
Even in the most bland case scenario we're talking tank's ranged attacks (Shield Toss vs Tomahawk vs Unmend vs Lightning Shot). Would you honestly prefer that all the tanks have the same ranged attack (via a role action)? I think most would say no. Even though it's pretty much literally the same spell cross the tanks, it's at least better that the spell fits the job "better". But you could likely imagine some light 'seasoning' to the ranged moves that doesn't do too much beyond some flavor (perhaps some nice niche cases, but designed in such ways that those cases don't destroy the important balance of end game content).
I understand role actions come from the whole ex system we used to have of cross class skills but at this point I find the role system to be the appendage that just lowers identity and being a transparently budget friendly solution to balance (don't have to make new skills). In the truest form of the cross system it was like having a sub job, pretty cool but very hard to balance. At this point it's non-optional sharing, role system is just the low development cost abilities SE gets to hand out. Maybe somewhere in there is the argument that "if it's not called provoke for all jobs you wont know to provoke" but that sounds a bit sad lol- might as well say all tank stances should be called the same else tanks wont know to turn it on to tank. At the point a tank doesn't know to turn on their tank stance because it wasn't called Iron Will on their Warrior I think they were a lost cause to playing their job right anyways. . . . XD.
So to be clear I don't support removing role actions because I just want less things I get to do, no.. I am for removing them so jobs can get spells that better fit their identities, even if it's just very superficial thematics, and in the lucky opportunities that they can add flare to each skill then even better (so a the superifical gain would be ranged tank attacks, meanwhile the more different examples would be like tank dashes or cures).