Bring in Friendly challenges you can do vs fellow faction members. Give an arena of sorts for members to be able to attack each other using no energy to test out new weapons and/or armour sets.
Attacks wouldn’t count towards any stats, no weapon mastery or finishing hits or able to farm any damage/ammo fired related merits. Simply attacking without any other side effects
This could be given to factions as default or it could be something that has to be unlocked via respect. I think it would be helpful to be able to have a place to test out new builds as well as bringing a new source of banter between faction mates