I'm fairly displeased with many of the interface points in this game. Moving things in and out of inventory is a pain. Dealing with the chain thing to manage group composition is really awkward. I would love to see these things fixed, but I feel like there is a single thing that exacerbates the faults of all of these annoying systems: there seems to be a minimum amount of time that I have to hold the mouse button down in order for the game to register that I'm trying to click something, and it's too long right now.
In practical terms, this means that if I'm trying to drag something from one place to another (e.g. moving things in inventory or moving crates around in the world), if I click and start dragging the thing away, the cursor is usually not over the thing that I want to move when the game finally decides that it should pick up the thing under the cursor. This results in either doing nothing at all, moving the wrong thing, or causing my character to walk somewhere that I didn't want them to go. Similarly, when I click on a portrait at the bottom of the screen to change who I'm controlling, it usually does nothing - I have to click and hold for it to work.
These are just a few examples, but I feel like this issue pervades the entire game experience and it's pretty frustrating. Is anyone else having this issue? Is there a setting I'm missing that lets you adjust this?