Currently there's no incentive to play pure monks. Everyone seems to be playing multiclassed monks, mainly with ranger classes for monkcher builds, or with other melee classes to add some of the monks abilities around level 6 to their main class.
Wouldn't it make sense to therefore buff the viability of pure monks? Maybe give them better capstones, such as one that doubles both their max dodge bonus and dodge chance, and maybe give them free no fail on a 1 saving throws things to all save types at level 20 monk.
Or something else, I dunno. But this logic seems to be abundant on this forum, and pure monks must therefore be gimped if multiclassing makes them so much better.