So, once I verify my assumptions regarding the hook up (i.e. that the non- functional and disconnected old dsl-pots line is direct wired to each outlet with the red-green wires, and the new dry-loop is direct wired to each outlet using the yellow- black wires) I am assuming my problem may be lack of ring current.

Would there be any reason to leave the yellow-black wires attached to the terminals for any outlet other than the one that serves the dry-loop (i.e. the one that my modem/router is plugged into? I assume I will bend back and tape the unused yellow-black leads.

The red-green leads I would probably leave all attached to the outlets, to give the most flexibility for locating phones around the house. I since my Panasonic wireless phone is doing 4/5 of the job right now, I really only want to use two of those outlets.