I enjoyed the hell out that movie. I think part of the reason was that I WASN'T very familiar with this incarnation of the Guardians; it came about after I got out of my comic-collecting time.
The GOTG that I was familiar with included Yondu, Starhawk, Vance Astro, Martinex, Charlie-27, and Nikki. Now THAT would be a weird-ass movie, although they are mostly active in the 31st Century, so no one would care.