Does not look like the additional options will help at here.
As far as the dual router, not sure if that will do what I need either. In that setup it looks like the feed from the ONT is coax but mine is CAT5.
Use the additional options to create a pfSense WAN DHCP client config that imitates the Actiontec. Then you can switch between the two without even having to release the IP address.
The dual router setup is CAT5 feed from ONT. CoAX from ONT only carries TV signal.