Man if Dakine Mittens are getting too hot, I am pretty sure that you would be roasting with Hestra lobster gloves. I generally try to get the heli glove and generally speaking Colorado is one of the cold places in the states. Mostly due to the high altitude. The Heli glove usually works for me well over 90% of the time. There are some rare days where I have to go mitten, but we are talking one or two days out of a 50+ day season I get.
You might look at the Heli Glove instead. Keep the Dakine mitts for the days when it's really cold. In fact you might look at a slightly lighter insulated glove from Hestra. I've got a pair of Guide Gloves I bought two seasons ago from Hestra that are still rocking. They have become my glove of choice for splitting actually. Leather, well insulated, good dexterity once broken in. Holding up great so far. I think I'll get this season out of them, which I rarely get more than one season out of gloves most years.