I'm going to make a response to a lot of the general feedback i've got into general points.
- I do think niche abilities do sometimes have their place on a job, a great example of this is ironically already on paladin which is clemency which has pretty much the exact same use case a cover (aka to save people in situations where that player was low hp due to lack of healers up at the time). I think clemency serves that purpose way better and is in general way more flexible as a option.
A lot of cases where cover could be useful in hard content like savage, theirs usually mechanics such as debuffs where cover unironically messes up and causes your death, where you rather would just use a skill like intervention or clemency.
I do not think a cool mech like cover should be just restricted to niche emergency situations, I would love them to actually utilise it in fights where it would be very useful, though this is hard without making it either required or not useful outside "emergency situations" which i think PLD without cover is already useful.
Niche and unique for the sake of it isn't really a good excuse, people still argue shield bash is a unique and "interesting skill" all I see it is a reason to hold back paladin as it's a "bloat" skill, I don't think cover is quite as useless as a skill like shield bash.
Lastly I do not think making cover a role action that is often used for fights is automatically a bad thing because "homogenization" while yes it's plainly homogenization that doesn't mean it's automatically a bad thing, I do think ff14 has a tendency to make bad homogenization changes and needs to walk back on a lot of changes but not all homogenization is bad, What we quite honestly need with job design is less homogenization and simplification but that doesn't mean sometimes you can't turn something like cover that to me is a bland and uninteresting skill with barely any use cases into something better (though theirs cases of giving it some other utility to make it slightly better as a unique to paladin generalist skill, I think it's full potential would be as a role action.
I'll stand by my opinion personally even if it's not popular here, I'm not against the larger issue at hand with poor job design though.