MoCA - Bridge - MoCA Network

I am getting ready to upgrade my old Series 2 Boxes (5 of them (4 Lifetime, 1 Monthly) running on PowerLine right now.)) to a new Roamio Pro and a couple of Mini's to start off with I may add one more Mini later if needed.

I understand that the Roamio and Mini's won't work with my existing Powerline setup and I need to use a Tivo Bridge to create MoCA Network to connect the Mini's to the RoamioPro to has a big enough "pipe" to stream to the Mini's.

My question is this - If I have the Tivo Bridge connected to my router to create the MoCA network is it possible to add an ActionTec ECB6200 Bonded MoCA 2.0 Network Adapter to a couple of rooms that currently use Powerline for internet connections to get a speed boost for other internet connected devices in other rooms in the house.

Also can you add a small 4 port switch to the Action Tec Network Adapter for multiple devices in that room without any issues?

ie:
Room 1 - A home office computer & Roku
Room 2 - Playstation
Room 3 - Another TV with a Roku
All of these currently have a Series 2 that is networked by a 200mps Powerline 4 port adapter for the multiple devices/

Thanks in advance.

I am excited to upgrade finally after all these years. Not excited for why.
The Cox Digital Mini Boxes (for digital conversion) are not compatible with the Series 2 boxes from everything I read. (I don't know if I want to be corrected if I am wrong. ;) )