Does this setup seem correct?
Basically the ONT coax to a splitter going to the Fios Moca router and the STB. Then a Coax in each room split by a two way splitter with one end to a STB to mantain DVR and Guide and the other end into a Moca adapter like the ECB2200V. Then an Ethernet cable to either a HDTV, PC or Gaming device.
Here's a Diagram.