The director's cut is pretty good
This much disparaged Peckinpah effort is much better when you see the cut he had stashed away. Hidden and unavaliable for many years. The cut he wanted and the studio didn't.
Yes, there is a director's cut, and yes it is on blu-ray and boy does it need a restoration:
https://www.blu-ray.com/movies/The-Osterman-Weekend-Blu-ray/307375/