UI difference between controller vs MKB

I noticed there's a graphical difference between controller and mouse/keyboard. The UI graphics looks better with MKB. It feels like even if you are on PC, if you have a controller, the game downgrades the UI to a console fidelity.

I get it that the way you navigate is different but why is the fidelity better with MKB? The graphics are sharper at the very least.

It's not a deal breaker but I just wanna point out.

Obviously there is still that big question why we can't use both at the same time. When managing my inventory, I feel using mouse is faster but when mapping, I prefer the controller though.

Workaround right now is I have to logout to switch and do one activity first. Yes, I can move items with controller too.