Nevermind... So the insualted pipe is heating to over 100 degrees (a 20 degree improvement), but that isn't translating to a higher temp at the register. I'm getting 72 degree intake, and 76.5 at the register. It's 55 degrees outside.
Also the system is now hissing audibly. It's coming from where the insulated pipe enters the furnace.
The only thing that was mentioned to me by my other contractor who did the system review, is that it's possible the installer didn't remove the factory installed piston from the thermal expansion valve. They had the wrong valve installed originally, and the goodman tech was working with them on the reinstall of the correct valve, but I have no confidence in these guys at all.
This is on the system that goodman isn't replacing right now. I'm concerned it's going to burn out too, and I only have a month left on my installer's warranty.
Edit: Same temp at register in first and second stage.