ORC... it's designed to cure the two biggest problems of the Wizards OGL 1.0 and 1.0a: (1) the license itself being copyrighted text belonging to WotC, and (2) Wizards having included a forced update provision.
That's where I stand too.
I'd do some legal due diligence on it first, but if ORC does as it's been advertised to do, then it'd be an obvious winner.
My goal would be an open license that could not be 'messed with' using tricks in future to try to close it down, and which people who used the content down the road would not be able to close it by wrapping closed content around it, but which did allow them protect closed IP outside of it - such as IP from art, lore, novels, games, movies, etc.
So if a future project was:
My ORC game and it's elements, as used to make an RPG suppliment for 'That new Rom-Com movie' which had new character options, an adventure based on the movie, and lore for the movie characters...
- I'd want them to be able to keep the lore and adventure closed, but put the character options in open.
The tricky question is could I force that with ORC? Force the 'character options' open without being able to mess up their IP over the lore and story. If ORC lives up to that, it's what I'd want.
But I've not researched any of this.