They need to decide what they are going to do...Battlefield or Bad Company...and stick with it. Diverge the two lines if they have to. Dont mix the two which is exactly what BF3 is. There were only 2, maybe 3, launch maps that weren't scaled down and catered to COD style close quarters or rush mode. Back to Karkand DLC, Armored Kill DLC, Caspian Border, and Kharg Island are the type of maps you expect in a Battlefield game. The rest belong in Bad Company.
As other's mentioned, the communication is Bad Company, not true Battlefield. No Command structure depletes the team coordination. No commander assets basically makes Recon a stat padder class, and C4 is useless except to blow up tanks. With Commander Assets, recon could have C4 and get behind enemy lines to blow those up like the old Spec Ops class.
BF4 needs to have nothing but large vehicle maps designed for Conquest first and foremost + command structure + commander assets. Everything else needs to go to Bad Company 3.