I have not looked deeply into Oathmark yet, but I bought all the rulebooks a month ago and read through them. It's a bit discouraging to engage more with the ruleset when I read that there might be soon a second edition coming out. Still, from the reading a bit through the rules and thinking through I agree at parts with the points from your blog post. I don't think I will ever use the kingdom/campaign system except for list building. It's simply the reason that it's more difficult to find gaming partner for a whole campaign than for one or two games.
On a side note: I just noticed that your avatar is from the game-icons website, liking that too
