Aside from the possibility of ranged attacks becoming OP (at least in certain situations like outdoors), one issue to keep in mind is aggro range. In DOS2, for example, where elevation increased the range of bows, etc., there were a few situations were you able to shoot enemies and not enter combat, effectively just cheesing a battle. If range of attack was increased, the aggro range would also have to be increased, which might be harder to implement for reasons not readily apparent.
Larian might have even addressed this issue, but I cannot recall.
All that being said, I have no issue with the range of attacks. If they could find a way to avoid the scenario in DOS2 I explained above, having range being adjusted by elevation (either increased or decreased) would not only be more realistic, but would give elevation a significance without the need to use advantage/disadvantage (the argument against adv for elevation being posted elsewhere).
