Early on in EA I seem to recall people having difficulty with the main gnoll encounter. It was mainly due to height advantage but also something else.
You didn’t hear too many problems from goblins even though they used height as well. What makes the gnolls different is due to their increased HP and more importantly, their extra attacks with a bow.
Height advantage will be magnified as more and more monsters get extra attacks. And since BG3 seems to target your lowest AC squishy characters first, they will die often. Gale is going to look like a pin cushion after all is said and done.
I truly believe Larian needs to re-evaluate height. I know it worked with DOS but it just isn’t compatible with 5e rules, modified or not.