The above is sound advice. I add a Vibram Raptor half sole to my boots for traction and it keeps repair costs down. On ice short of using ice crampons there's not much you can do in regard to traction.
A good option for insoles is the Durashock insole made by Wolverine. After I tore up my plantar fascia on my right foot a while back that's what ended up in my 1Ks. They aren't thick but they work well for comfort. They come in whole sizes only so if you're in between sizes order up to the next whole size and trim if needed.
The burnishing doesn't bother me. Wherever my jeans are rubbing against the leather the same effect is starting to develop. I like it.I have no intention of applying anything heavy with wax to these. I'm not a fan of beeswax rough out leather. Since the boots are made of Orion leather, which is a heavily oiled leather, that's what I'll use to condition them when the time comes.