@stephenw10 So, moved back to the Intel card and I am seeing the results I expect to see now.
So, the major issue was that I had a hard gateway defined for the LAN interface, which started asymmetric routing issues. While supported, the bce based card was the second issue.
I'm seeing ~230/~110 on a 250/125 circuit, which matches the old firewall almost perfectly, so I think I can put this one to bed. Now, to get BGP and all the other stuff moved to the new firewall, probably gonna setup HA between the old and new and use that to make the switch between the firewalls.
Thanks everyone for the input, it got me in the right direction and hopefully it will help others who come across it.