Osayo All,
I know this is an old thread, but it does have alot of good info.
As far as greasing mocs, This is MY experience.
I use mocs alot. I have found that greased mocs, in any weather WILL get wet. It just may take a bit longer to happen. The difference is what happens after they get wet.
Now from my experience, Wet greased mocs are really slippery. They retain the water and eventually can actually fill with water.
They take forever to dry.
I stopped greasing my mocs and what i have found is that, yes my feet and mocs get wet. However they dry really fast at the end if the day. I carry a second set for night that are dry and use them the next day. If not dry by morning, the wet ones will dry in short order.
As far as Insoles are concerned, I use them too. There are all sorts of period alternatives to modern insols that are perfectly PC to use. They do help with the sharp stones.
In winter, I have a second set of mocs that are larger and fit over the other set. These are heavilly greased. When frozen they are just as good as when dry. they do a tolerable job of keeping the inner mocs dry and warm.
Theses are just some thoughts from things that I have done.