The way i see about Quotation marks and the need of it to be there is to prevent mischief and griefing.
I do not care if the player likes to be in their disguise identity 24/7 nor they simply like to be anybody esle than themselves for 24/7 because what i'm only concerned about removing Quotation marks is still, prevent mischief and griefing.
You may say that the existence of Quotation Marks for Disguiser(s) is a huge disadvantage / metagame / spoil the fun but none of these will cause cause mischief and griefing.
Griefing isn't just complaining in forum, it's includes, and is more than that.
There may be others that think that i'm over-exaggerating but the current player base are mostly, if not all adults, even actively participate in politics and schemes IG.
It takes only mere moments to cause grief but months if not years, for them to recover.
The existence of the Quotation marks, at the bare minimum, if someone disguise as "Aleksander Hornraven" wore the same outfit as him and decide to use this disguise to sabotage a very dear friend of him may feel like interesting RP but not everyone takes betrayal the same way. And if doing so, causes them having the need to use Discord as an OOC means to resolve this kind of mischief, it defeats the purpose of removing the Quotation marks in the first place.
We all know that OOC method to resolve any IC issue is against the rules so why, even open the venue for such cases to happen when you don't need to actually keep testing the limit of the our own sanity.
With all intent and purpose, "Be Nice Rule" should be the first thought before making any changes that simply invites more troubles.
We're here to RP and not actually here to /live/ in the game world.
There should exist a curtain and i think, the quotation mark is the curtain.