Hello ! Some new unreasonable suggestions :
Agressive Roller : i fell that rollers are not at their full potential yet. You can throw them. But they only swap with "them".
What if a new type, "Agressive Roller", did change faction on activation ? This you could active them, then they would turn into "us" and be able to hit or attract "them".
And vice versa for agressive rollers starting with "us" faction : ennemies would be able to send them at is.