I've checked around the discord and, although it's possible I'm being blind, I don't think it's been mentioned anywhere before and I don't see it in the game atm... so here I go.
Something potentially rather simple to add, but imo a thing that I think would add to the "coopetition" of the game. I want to be able to compare the arsenal of people on my friends list so I can see what they are working with. This would be helpful to be able to make suggestions of army focus and coordinating things like future boss raids and other coop/guild events. But also besides that, it's nice to be able to see who has the more impressive army amongst friends! 😄