drymax socks may help, if you have a humidity problem that aggravate the situation.
otherwise, I have never been in a better setup than with my heated insoles. I still have cold toes and the heat should come from the top of the boot, imho. But I do ride near 0 celcius. Its expected. So I will look for actual heated boots, but no great hopes to find the perfect model. I will have a look a heated socks for sure...
For now, I'm not going back. The heated insoles stay in the boots (under the existing insole). The Y cable is running in the pant leg between the shell and the liner, so I never fiddle with it. The plug is exiting by the crotch then runnigg to the side. In a nutshell, the pants hide the cable well. The 9 levels dual port PCM controller is in the jacket pocket on the side where the plug is coming out. In have heated gloves too, which heat the outside of the hand, much more efficient than heated grips, less expensive and can use on other bikes provided the socket.