As a compromise, instead of removing Height Advantage altogether, they implement a Height+Crouch feature. So, basically, if you are more than 10 feet above your enemies, and you Crouch, you force all enemies to get a Disadvantage on all rolls against you because you are on higher ground and getting lower to the ground. Thus, you reduce your own target surface area, making it harder for an enemy to hit.

You still wouldn't get advantage on your ability to hit lower targets, but it would be harder for them to hit you.