I'm not so sure about that. While Barrett certainly had a path in mind, the time spent following that path was relatively short lived. I'd argue that the Pink Floyd we know today began after Sid's OD, when they must have wondered what the hell do we do now. Well, regrouping and putting together Dark Side of the Moon was what they did, and while I dig Piper at the Gates of Dawn, it's not what I first think of when I think of Pink Floyd.