I like the solution for free "ascend/descend 10 ft" actions while you're flying. It seems relatively simple. And if it can't be visually represented in the game for whatever reason, just:
An easy fix would be giving a flying character a 100% dodge against melee attacks with a proper animation (pulling back a little) unless restrained. That is "not cool" but at least it is very easy to implement I think.
We should take it even further and just make them un-targetable by melee attacks. Otherwise, depending on the enemy AI, the enemies might spend turns melee attacking a creature that realistically is ~15 feet above the ground and un-hittable. Basically cheesing the game.
