jmartkdr2
Hero
Monks have two distinct concepts that don't depend on each other but don't exist in other classes: unarmed combat and ki as a magic style.Monks carry a lot of conceptual space in one class. Like Druids they would benefit from a more modular approach to character design. 5e works better with classes that have a tighter focus.
Both could probably hold their own class if a bit of a thin one, but the real issue is if you want one, you have to take the other along with it, which makes a lot of monk-adjacent concepts not workable.