NCM 7.3+ need centralized option still?

Hello, I have NCM 7.2.2 with 4 polling engines and currently rely on the fact that only the main polling engine is the only one who performs the configuration activities due to firewall and compliance reasons.  I understand that after 7.3, this is no longer an option and the NCM functions are distributed to each polling engine. 

My question is this:  is there a way to keep the main polling engine as the master for all NCM functions but yet be assigned to a different polling engine after version 7.3?

Anyone else run into this?  For me this means a total redesign of our environment.

Thanks!