48hr protection or attack-free planet passing means big families get into assimilated fam’s core with portals and after that, big fams just take over the area and small fams stay small
Giving assimilated fam’s active attackers to the smallest fams would allow them to take over assimilated fam’s ex-core area more easily. Ressies and bankers could have a chance to defend until cavalry arrives, but in worst case, if their ex-attackers would just farm them to nothing, at least they would have a new family, which should appreciate their possible activeness and maybe pass some planets to them for cheaper infra compared to already big empires.