So, I'm not sure, but it seems like one could houserule GW4's skill system to a more sane, d20-esque skill system, by just making it d20+attr+skill, and adding about 10 points to the default difficulties.
Admittedly, it's been a few months since a gave the game a thorough read, so I may be missing something. In fact, IIRC, there was some things that came up when I was reading, but I can't for the life of me think of what they were. Maybe I'll give it another read through during my upcoming downtime (I've got a move today, and I won't have internet for a while).
Anyone? Anyone at all?
Yeah I think it be pretty simple. You basically just divide by 5 for the common skills (Read/Write, Climb and Swim) and their class skills you'd treat as normal but add 10 to the difficulties. (Then they'd be attribute mod+skill score+1d20 beat target number)
That makes Easy 10 and Nearly Impossible 25 (you might buff the far end up a bit, but that's up to you)