Supercell I do have suggestions for clan perks for level 10 clan.
Instead of 2 levels up for troops donated change it to plus 5 space for clan castle 🏰. Because I notice that level 10 clans already do have a max troops to donate so the perks 2lv up bonus is non sense.
this would be quite unfair for low level clans facing level 10s in clan war. however i do agree that the upgrade perks should be changed. maybe extra refund for donations?