There not being a difficult tank doesn't keep PLD from being an extreme case, though. Like, people frequently invoke it letting them 'focus on other things' as an argument in the job's favor, because it has less going on than the other tanks despite their also fairly straightforward rotations.
After playing all three tanks for a long while I've found there's barely any difference when it comes to noticing stuff during tense battles. Your rotation regardless of difficulty eventually becomes muscle memory. You can still mess up but that's more to do with losing your cool when bad things are happening. I drop Goring, I mess up Berserk, I use Dark Arts on the wrong thing, all of this occurs on all three tanks if I lose my focus or something takes me by surprise and unnerves me.
Paladin could just be mashing two buttons one after the other and you could still mess that up if you lose your focus.
I think it's a really really bad point for someone (not saying you said this) to argue in favour of Paladin being boring. Simple shouldn't mean unengaging or boring. Warrior to me is the right kind of simple while Paladin is more like the clunky kind of simple.
In these sorts of discussions no one's talking about turning Paladin into a pro game of Starcraft 2 so I always find it strange that some people are heavily opposed to changes.
I understand some people are worried that Paladin is going to turn into a super complex job despite no one arguing for that but regardless of what happens some people aren't going to like the changes just by virtue of the fact that there will be new abilities from 60-70.