Sam,
OK, that explains excessive sweating and cold feet. Your perspiration is trapped in the socks and wet socks are poor insulators.
Put the VBL next to your skin and you’ll sweat a little but the socks stay dry. If conditions are so wet that your footwear will get soaked then you can use another waterproof barrier outside of the socks or use waterproof “not so breathable” footwear..
The same approach works great for handwear. VBL gloves inside and warm handwear over them plus shell mitts on the outside (water proof in wet conditions). I have Warmlite VBL gloves but now prefer 7mil nitrile gloves (tough and inexpensive at Harbor Freight)
You may not like the clammy feeling that comes with VBL directly on the skin. I don’t mind that but many do and they use very thin liner gloves/socks inside the VBL.
The sweating does not get out of hand unless your hand/foot insulation is excessive for the temperature. You’ll likely find that you need somewhat less insulation than you without the VBL.
Seeing that January weather has arrived about 6 weeks early you could get out and try it right away!
If you msg me a mailing addr I’ll send you a pair of the gloves to try