As a melee main (and clearing savage and ultimate before someone booh me being a casual doing low-end content), I think positionnals suck. There is nothing fun about it, nothing that requires skill either, you just have to do a small step to the side 80% of the time.
At best it keeps you awake during slow fights, but that doesn't make that interesting. This should not be the way to go (arguably a job or two can keep them as core of their mechanics, like Monk) and should be deleted imho.
Yes playing melee is getting more and more easier, but positionnals isn't the answer to that. That's just an annoying mechanic that brings nothing to the table and can be frustrating at times with how much boss reposition themselves.

That said, I won't make a tantrum if they stay, I don't really mind in the end (especially since now i'm maining reaper and they're very easy to plan ahead). But come on people, be honest, that's not an interesting mech and that doesn't require any skill.
Also it is irrelevant in solo, this alone should be a good reason to consider the deletion.