Simply replace height giving advantage/disadvantage by a ±1d4 to attack rolls only ?
The differential will be around ±2.5 on both sides, instead of ±5 wich should litteraly halve the benefits.
This way it will also be cumulative with other boni/mali by spells (like bless/bane will add/remove another d4), but advantage would require more work from player, like facing enemies to "backstab" them (minor illusion, cat become suddenly useful), or other effects like true strike and such.
Right now the combo height = both advantage to attack + disadvantage to enemy is flat OP.
Using high ground to remove natural covers is fine, adding a slight bonus to hit / malus to be hit looks fine to me, but automatic advantage makes thing too powerful, not to mention some nasty combos like auto-sneak attack with ranged weapon for the rogue...
Last edited by FenrisC; 23/10/20 11:01 AM.