Well I use both, scrappy mod working perfectly fine and URM. URM is always a good complement to any mod anyway, but that is me that am always curious what is running behind the scenes hehe.
I think they meant that with each update there is additional mod counter measures added that make the scrappy mod to take longer to update and working, but that is with almost every mod, if isn't updated the saves usually get borked. And yes its running perfectly fine for me but I used my Sancho modded saves with scrappy mod, I didn't had none of the issues people were having with scrappy modded saves.
But anyway scrappy updated it very fast considering the complex branching of the game and we waited 14 months for the game update, what is a few more days of waiting for the mod anyway?