Halfway through a mostly vanilla game with your mod, and I like it so far. Marathon mod mostly inflated plates and I found that weird. Yours makes the big structures more expensive, which makes more sense to me.
I think it would be nice to start with maybe 4 burner mining drills or so, as it takes rather long to start your economy with just the one, as you also need to mine rather large amounts of stone.
Also, maybe reduce the wood cost of basic electric poles. I got a good start surrounded by forests, but I cut half of them down just for electric poles. If I had started in a desert, I would have had to add greenhouse mod or something to make do.