By removing the monster crits it feels like the change it about never having the characters feel like they are going to die. There needs to be tension in the game or I can go play a video game on 'not-so-hard mode' and just respawn at the camp fire.
My take on crits on weapon attacks...
Kensei Tortle Monk and take Mobile at 4th. Hit and run. Speed will eventually let you hit and move so far away that it takes creatures their Move and Action to catch you. When you are out of range you use your Bow to shoot from range before moving back into Melee combat. Yes, there are trade...
SlyFlourish has a complete article on how he used the combo along with some examples. I have the bot set up myself and I have been trying it out since I have some players that don't have a laptop and only have a phone. Please no comments, I shake my head also.