Earlier today I finished leveling a toon thru the expansion and went on to get Rockus (the desired comp for the RP aspects of said toon)... Upon getting him, I realized all that could be changed was his weapon like many of the other KOTFE story companions.
Not being able to cosmetically change the gear/outfit of most of the KOTFE comps has been quite irritating... Especially now, where there is nothing unique about a comp expect how they talk or physically look, companions like Rockus and others like Hemdil Tre should be able to wear armor like former companions that you recruit thru endgame such as Yuun and Pierce to more effectively cater to those who do value the RP elements a companion can add to the game...
If all companions just have cookie-cutter abilities now, we shouldn't be forced to use them in the mediocre outfits we unfortunately recruited them in...
I hope this is fixed in one of the coming updates....