[@AtomicNut] You are not a punching bag, don't take it as such. The only penalty still in effect right now is the tax levy against your bridge tolls. Which is set to expire in 380 AC. (You can always use that in character drive/motivation.) Losing some land hurts, but it isn't as detrimental as that toll fee.

As for your Lannister Freys, here are all who survive.
Genna Lannister, Tywin Frey, Willem Frey, Lyonel Frey, and Walder Frey (Red Walder).

Up to you how succession works after Old Walder died.