Planetfall had an amazing system of relics you could find to unlock things you could use the imperium currency to purchase in game but with limited slots. You could equip special units, equipment, and a doctrine. All stuff that is compatible with AOW4's design. Also playing as a race increased the level and allowed for unlocking higher tier units for requisition.
This was a brilliant and deep post game system. The one is AOW4 is a joke of a handful cosmetics and trait unlocks. Can any dev confirm there will be a rework in the future for the pantheon which is clearly a last minute / underdeveloped system?