Deleuze is so overrated(although I am personally biased against everything that came out and was concurrent with Mai 68 in general). I don't know if you read it in French, but in French the only "French Theorist" worse than Deleuze/Guattari is Baudrillar(for how bad the concepts are).
IMO the most interesting one from that era is Clouscard.
I find it incredibly satisfying to stretch my brain with books that are inaccessible on the first read.