Well, FWIW, I did managed to finish the game blindly when it came out but basically thanks to stealth cheese. It was an average sniper/traps/grenades build and I highly doubt that I'd go trought out DC w/o stealth. So, if
Ol' Willy wanna try furher - I'd say go for it. Just ignore tough enemies and develop char how you can otherwise.
Well, I guess I can progress further without much fuss with stealth and traps spamming, but what fun is that? I want to kill stuff, and Underrail is known to be especially good for that.
The lunatics east of GMS are not for a green character. Underrail is like some other games in its placement of enemies that just should not be engaged until a later level. Camp Hathor can also be tough. If you haven't done so already I'd just head for Rail Crossing or, preferably, Core City.
And as a further point, not directed towards you necessarily, I think the idea of the centrality of the build is a bit overblown. I'm on Dominating right now with a build that could certainly use a lot of tweaking, and yet I've managed to get to Level 22 without a huge amount of headache. A couple levels ago I tried to start Expedition on this character but it was a non-starter. The savages on the beach are just too much. Other than that, though, it really isn't bad at all. If I can get by with just a halfway-decent build on the hardest difficulty (a shotgun char, btw), I think anyone else can on any difficulty.