One issue that I have with my Black Diamond Guide is that they are obviously too unwieldy to use with a phone (regardless of whether they are gloves or lobster), so I need to take them out when I want to use my phone or something that require a bit of dexterity. When I do that, I have very careful to minimise the amount of snow falling into it. I wrap the strap around my wrist to stop me from dropping them, but since it means they will hang upside down, the opening will face up allowing snow to fall into it. Inevitably it means that it will get wet, and though it is warm enough to cause problem, I am not sure if there is a better way around it?
Recently, I tried using pairing a cheap glove liner with an inexpensive mitt. The plus side is that it means that my hand never need to be fully exposed to the elements (cheaper liner is still much better than bare skin), and the combo is decently warm for the price. But then I encountered an issue. Like the Black Diamond Guide, the inside of the mitt will get moisture in it, though this time I have an extra barrier in the form of the liner. Great right? But at one point, it got so cold that the inside started to freeze. My binding also got stuck because of the cold, and since I couldn't get it unstuck with mittens, I did it while wearing the liner.. only to find that second later, I really, really struggled to get my hand back into the mitt because several part including the opening was frozen stiff. In fact, everything was frozen stiff and even after I managed to force my hand back in (under some pretty intense wind chill), I could only get it in about half way.
When riding hard I don't have too much issue with cold hands so I never really thought about a good system to keep everything warm and dry but I think I will need to think of something now.