I've worn the arctic weathermate style of steger mukluks for about 10 winters for activities from dogsledding to hunting. I'll try to give you a fairly objective opinion about my experience with them. I can't compare them to modern hunting boots but they are very warm, light quiet and comfortable. with addition of spray on silicone waterproofing they are "ok" in regard to water resistance, but nowhere near waterproof. they will do ok for a few hours in wet snow but I wouldn't want to walk very far through water in them. they do dry fairly quickly when they get wet however. they work best in very cold, dry snow and similar conditions. they are reasonably durable. my 1st pair lasted about 8 years of fairly heavy use. In regard to warmth, they aren't quite enough when sitting in a tree stand in the late season (temps about 10F and colder) unless I use chemical foot warmers with them.
I think the soft sole increases foot muscle activity when walking and helps keep feet warmer. this may come at a price. If your feet are not used to going barefoot, wearing mocs or other softsoled shoes and you walk very far, your feet can get sore and may even get plantar fascitis. but as with all things, each feature has its pros and cons.
hope this helps
Ted