@Bill,
I have boiled wool mittens with leather palms that are actually quite nice. (Except the leather isn’t quite large enough over the thumb tip, so they will wear out prematurely there). Even those still let a fair amount of wind through though, so in breezier conditions I still need to add a shell.
I have found for my torso that in most situations I don’t like using something like a nano air, fleece or wool sweaters. Yes, they breathe well, but because they are so air permeable, every time the wind picks up, or my speed (skiing or biking downhill) picks up, I get cold, especially in the front, while the rear is still very (too?) warm. Also, if there is some snow falling, it will collect and soak through fairly soon.
Instead my standard system now is a baselayer, (minimal insulation as needed), and a breathable, and very well vented shell.
I find with this system I can more easily maintain stable comfort, even as wind or ground speed changes, simply by zipping and unzipping.
The fact that it is much thinner also means it doesn’t hold nearly as much moisture, and fallen snow doesn’t stick to the outside as much.
So, I figured I’d apply the same system to my hands.
As far as activities, this is for general winter movement:
Backcountry skiing on AT or Nordic gear. Maybe slow paced XC track skiing.
So the snow resistance requirement is minimal.
I found in the past though, that when I used plain power stretch gloves or mittens, I would soak the palms or fingers tips, just from grabbing my skis to step in and out, or add wax.
Same with backcountry ski touring. Grabbing my skis, messing with bindings, grabbing a railing, rock or tree as a handhold, adjusting boots, etc.
So, most of the time, I don’t need truly waterproof palms, just a bit more water resistance than fleece or wool. And, the other reason is that fleece or wool palms and finger tips wear out long before the rest of the glove.
For the backhand, I figured a woven shell fabric is better than a fleece or wool one, just like for the torso. So no extreme snow demands.
For snow climbing I would go for fully waterproof mountaineering mittens.
The other thing that has changed in the last years, is my dependence on my touch screen phone.
I mainly use mapping on my phone, take pictures and use a clinometer for avalanche terrain.
So, what works well is a touch screen liner, with a big gauntlet mitten with wrist straps.
I can quickly slide my hand out of the mitts, still have some protection from the cold, use my phone and pull the mittens back on.
This is another place my boiled wool mittens are non very functional: they have a long, fairly narrow cuff, and no wrist leash or attachment point for one.
Perhaps the best answer is to modify those so they have a gauntlet cuff.
I do have a great seamstress here in town.
As far as VBLs, I have only tried nitrile gloves a bit, and didn’t like them. I might have to try more and difffernt sizes and layering combos.
For my feet I like VBL, (for overnight trips) and wear them over thin liner socks.
As mentioned, I bought some RBH VBL mittens liners, thinking that would be a great option, But, like I mentioned above, I don’t find them that warm, and for this application, the damp liner really chills fingers when you remove the mitten.
So, if I go for VBL (liner) gloves, I don’t see the need for a VBL mitten over that. That might be the system I have to go to, because then I can use one of my many coated/laminated mitten shells.