Perhaps set Height Advantage yes/no as a setting toggle. It's the sort of thing that's GM discretion so maybe also leave it up to the individual player.
I'm all for toggle options. Larian should use that more so we can better tweak the gameplay and rules to our own liking. Maybe (hopefully) more options will be added after EA. I'm guessing they want all players to have more or less exactly the same settings during EA. Makes it easier to evaluate feedback. But too many settings will probably also make the game harder or more complex to balance.