The problem with the contr4oller, ios not only do you still haev to 'see' the container, but you must physically move to each one before clicking it.,. Whereas with m+kb, you can click, and the action i s completed for you..I personally couldnt stand using the controller, and i also miss some of te containers...
I wish the Alt key was a toggle, rather then a press & hold.... Or an option to have it either way atleast..Not that the toggle would be any different, but im sure some would find a way to be upset..I find that im walking around constantly holding Alt, and it would rather just press and forget.. Those that dont like the toggle, could simply use it as it is.. on/off, instead of a constant depress..
One of my character always has "Walk in Shadows" + telekinesis. This make sit incredibly easy to steal/loot items using mouse + keyboard. Meanwhile, with the game's default controller interface and the "search area" radius thingy, it makes it incredibly painful and frustrating, because the controller interface really becomes an impediment to telekinesis.
However, what I have done is to use Xpadder to map the mouse + keyboard controls, which allows me to use my Xbox controller, instead of using the game's default controller support. I use left trigger for the "show all" key, which makes it quite intuitive. Alternatively, one can turn it (or any button on your controller) into a toggle using Xpadder so you don't have to hold down the key.
Although there is no way to "show all" containers, sadly.