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).