I think it would be a nice feature to add the ability to make items invisible at the illusionist. It would be a minor feature, but I’m sure there would be some people out there who would appreciate it.
To use an example, I often find the pants slot would look better if the boots could be hidden. The pants already have a perfectly good texture that already encompasses the lower legs. When you add the boots on top, there can be a color/value mismatch and unusual proportions for certain boot types. Sometimes I’d also prefer if I could hide the shoulder slot.
I never liked to see amulets or rings on my character. Oh, wait…
But seriously, +1 from me. I sometimes don’t have anything good to put on my head or other body parts. I don’t like few gauntlets too. Mages with shoulder armor are weird most of the time. I’d like to use a no-weapon weapon. That would be actually stupid, but if that was implemented for offhand/shield/second weapon I’d like it. Animations would be problematic though, but it could replace the animations to one hand weapon anyway.