Do you have 4x4 ? or rwd only ? Tires help a lot, and depending of what you're doing there are some basics you can have. Not sure about pass thru devices you're referring to and I have no experience with those Kumho tires but their siping doesn't look bat at all.
How much PSI were you running ? If you're doing deep snow you should consider tire chains. If you don't have enough backspace in your wheels for chains you should have a winch and/or go with at least somebody else other than you with another vehicle and both should have basic recovery gear. I don't venture outdoors without the basics ever, a simple fire road in the summer can be a nightmare under a winter blizzard so things like that can change your outlook for good. In deep snow like in sand or mud you should deflate your tires to have good flotation and more traction. you have no idea how much that helps if you haven't tried it yourself. if you're running 50PSI your tires are more likely slicks in snow with that much pressure, much more in deep snow. Go down to 15PSI, and in snow you're not placing any load on the sidewalls so you can go lower if you wanted. Get yourself an air pump of course capable of inflating your tires backup, and put that in your recovery gear, you can have traction boards, a kinetic rope and tow strap, tree saver, soft shackles, steel shackles, shovel, a winch and all their accessories etc etc. we spend days in remote areas offroad where cell reception is not a thing, so we all have basic self recovery capabilites and better we never go out alone, we have at least a 2nd vehicle in the group so we double the provisions in case chit hit the fan
if you're just plowing snowy roads then maybe a set of wheels with enough backspace that will allow you to run chains in all 4 wheels might suite you better, chains are not that expensive, and same deal lower your tire psi with chains and that will give lots of traction in icy conditions.
Have fun.
