That's the CAG struggle in a nutshell, isn't it? I still have AC: Origins and Shadow of War sealed from last Black Friday that I got at a GREAT deal but which doesn't seem that great anymore. I've played all the new releases I bought this year (God of War, Detroit, Vampyr, Shadow of the Tomb Raider) and they've all dropped significantly. Meanwhile, I'll have to wait longer for games I was specifically waiting to buy on BF (Spider-Man and 50+ games on my wishlist which haven't gone on sale all year). I always buy games with the intention of playing them as soon as possible, but sometimes I get distracted by the latest shiny object. Hindsight is 20/20, etc.
I was in the same boat as you with Shadow of War, but I recently unwrapped it telling myself to play it for at least an hour and I got hooked. It's such a fun game and the story was surprisingly entertaining too.