Do report back on those, ...... I might try a pair to those crab gloves.
Its common for people to always search for THE ultimate glove. The one that keeps you totally warm and comfortable, and keeps the water totally out.
Unfortunately, there is no such glove. Anywhere.
Sure, some are a (bit) better than others, but take the waterproofing - what many experienced long distance wet weather cyclists know is that you basically need to take more than one set of gloves, and just swap the soaked ones for dry ones when the inevitable time comes.
I've started to try a version of this for the cold - I wear one set, and have another duplicate pair stuffed into the front of my jersey so my body heat keeps them warm. I rotate these two sets around every say 30 min or so. Its not as good as having heated gloves, but its better than sticking to one freezing pair all the time!