Wolverine was not the star of the graphic novel. Kitty Pryde was the main character and the one who went back in time, and things went very differently. (God, I love her. She's one of my favorite X-Men. Again, much more of a main character in the comics than she ever was in the films, depending on the era, and allowed to have a huge, years-long coming of age experience.)

I'd read it because it's a very different experience, and Days of Future Past informs everything. It's a seminal X-Men work.