It is unfair because everyone doesn't want to play OR a story mode OR a RAW mode as you suggested in the previous message.
But anyway I won't argue more about this because it's not very constructive.
And that still does not make removing it "unfair"; just because you like a broken mechanic, doesn't mean that fixing it, is making the game "unfair".
You, like Larian, seem don't seem to understand the significance, that Advantage gives in 5e, that's why it is applied sparingly in combat scenarios.
As it stands now, the only thing that applying Advantage to ranged attacks at height succeeds at is, overbalancing ranged combat, and creating a scenario where getting to high ground is paramount in every encounter.
