Hmm, I do think it's a too easy to swap weapons, but a full action seems harsh, basically you'd miss a whole turn if you want to swap weapons unless you were hasted or could attack with your offhand. I think that might be as per 5e but my sense is that it would make fighting feel even less dynamic than a turn-based system needs to and that matters in a cRPG. Plus it feels a bit unfair to ranged fighters, who would need to lose a turn to swap to a melee weapon to deal with a sudden nearby threat
Yeah they messed up with their positioning so now they need to get out of it... So whats wrong with that?
When was the last time you used disengagement? It's there for a reason.:)
They are trade offs and you still have things you can do, you still have many options and we will have more when the game fully releases. You get rewarded more for staying out of that range... Like i said makes the combat more tactical risk vs rewards thing...