Inxile could not get the Ui right on pc after countless iterations, still presenting a half asked attempt as it is. I very much doubt they have the skills to remake the Ui for consoles effectively
Have you noticed how many skills quick action bar can hold?
8
Now let's look at Dpad from random x360 modification.
Same shit works even if it's dualshock-like controller, you just need to press 2 button at once. If it's only PS4 version then it's even easier because you can use trackpad.
And list-based inventories are easy to design. They're shit but they're not any kind of complicated.
Seriously in the beginning I thought it didn't made sense. Skills being chosen from the list after pressing empty quickbar, range indicator allowing for aiming at particular enemy, gridless movement but grid-based combat. The game wasn't developed with consoles in mind, but they've left themselves a way to port it not-so-painfully.
Compare it to Divinity - everything is grid-less, including moving objects, click and drag being used quite commonly(both when moving objects, skills and inventory - see crafting). Swen was the first to say that he wants to have his game on consoles but sure as fuck he'll have hard time re-designing the interface and controls.