Brace should be available to all factions or none.
Vet 5 should be available to all factions or none.
Upgrading without the need to go back to base should be available to all factions or none.
No need for side costs for nades and AT nades should be available to all factions or none.
AT only mines should be available to all factions or none.
Early game reinforing ht should be available to all factions or none.
Snipers should be available to all factions or none.
List goes on and on and on...