This is something I've noticed on my most recent run - the majority of stuff you find will be unused.
It's the most obvious with armor. There are plenty of cool armors you can get, but unlike K1, where you don't have acces to the Force at the beginning and many of your companions are not Jedi, they get to use these. In K2, not only do you have the Force from basically the start, but also can make almost every organic companion a Jedi. You can in theory make an armored Jedi build, but that's a complete waste.
There are two characters that will always wear armor: Bao-Dur and Mandalore, with the latter wearing the same set through the entire game.
Do you get that? In your entire playthrough, you and your companions will be running almost exclusively in Jal-Shei armors, Jedi robes, and character specific clothing. I feel like it's a waste.
Okay, that's enough of me rambling.