Not FiOS, being Canadian we have FibreOP. Sort of the same.
I was able to remove the use of the router by spoofing the MAC address, and also placing the WAN on a VLAN. I can fully get rid of the Actiontec, but there's a twist. Number 1, I'd have to wire my houe with Ethernet to use it without HPNA. Number B, I'd have to switch to a router OS that supports priority tagging.
I have no plans to do either.