The things I like to propose are:
-Make the water pumps destroyable with Satchels.
Reasons why:
-Water pumps are and were very delicate and therefore easy to destroy.
-They do not matter anyhow when the waal is breached.
-It would be fun to destroy the first allied water pump as a Cov Op, when they are already at the old city.
-It would be fun to drown the allies to the tunnels.
-Make the allied command post constructable by both sides.
Reasons why:
-In the beginning that is where the battles are.
-The allies go there very seldom after the capture of the Old City.