FormerlyHemlock
Hero
I've been questioning disengage a lot lately. Casters should use shocking grasp or misty step, and anyone with decent armor should use the dodge action instead of disengage.
Edit: disengaging with a bonus action, a la rogue, on the other hand is good.
5E can be measurably improved by removing the Disengage action from the game entirely as a variant rule. The way this works:
You can move at full speed forward or half speed backward on your turn. If you move out of someone's threat range backward, you don't take an opportunity attack. If you move out of someone's threat range without going backward, you are turning your back on them, and they get an opportunity attack.
Consequences:
(1) Thieves that want to use Disengage will now Dash backward instead.
(2) The whole issue with "does an incorporeal creature that moves through a wall trigger an opportunity attack or not?" disappears.
(3) Opportunity attacks (kind of) make sense.
(4) Because of #3, a DM can now easily determine whether, for example, you ought to get an opportunity attack against a paralyzed creature. (The answer is obvious: 'yes.')