In short:

Only got the game today. No controller.

I click and hold to keep character moving and prefer using Rshift to attack instead of auto-attack. Despite keeping mouse clicked, character locks to random enemies and doesn't unlock until one is dead.

Very irritating. Would at least like option to disable auto-locking to enemies when clicking and holding.

EDIT: You know how hitting shift makes your character attack? Oh boy, I wish I knew what that was like!
You know how clicking on a place on the screen makes your character run to that place? Can you tell me what it's like? Must be exhilarating.
You know how your character responds to when you press any of the numerous buttons on your keyboard? I DON'T!

You know that scene in Guardians of the Galaxy Vol. 2 where Quill and Rocket keep taking control from each other while navigating a quantum asteroid field? THAT'S WHAT THIS FEELS LIKE, BUT INSTEAD OF ROCKET, I'M FIGHTING FOR CONTROL WITH A SPOILED FIVE YEAR OLD!!!

TL;DR: Mojang, your keyboard controls are SHIT and half the time it just takes control from you and makes you stand around like an idiot in the middle of A ZOMBIE HORDE!!