I wouldn't mind seeing them go honestly. But it kind of depends on a job by job basis. Monk is constantly moving between rear and side so you could argue it's an important part of the job's playstyle. But the other melee don't have so many. It would be making playing melee easier if they went away, but personally I always found positionals to be kind of arbitrary and forced? Like I could understand if say, you had an ability called 'backstab' like in WoW (forget if they removed that or not) where it makes sense to have to be behind the enemy to get a full effect. But I haven't noticed any real thematic reason for positionals. They're just...there, for the sake of having them, for the sake of making melee slightly more complicated to play optimally. And keep you from doing your full dps in solo content/quests when you don't have a 'tank' to face things away from you.

Honestly, I woulnd't be sad to see them go.