It's the kind of list an English professor might make, not necessarily a sci-fi fan. In particular, Dick's genius was recognized only after his death.
Even though sci-fi sometimes rises above other genre literature, it's not taken that seriously by literary types. Baudrillard talks a lot about Dick and Ballard and that's it. Stanislaw Lem (whose Cyberiad ought to be on that list instead of The Futurological Congress) himself said that Phillip K. Dick was on a whole other level than other sci-fi writers.
Notably the list subverts the category of "novel" by adding a lot of things (comic books, concept albums) that aren't really novels.
I think Fred Pohl is missing (say Gateway) and also Joe Halderman (Worlds!). I'd rather see any Frank Herbert book but Dune (say Whipping Star or The Santaroga Barrier.) For that matter I'd like to see something from Heinlein before he had the stroke like The Moon is a Harsh Mistress or Glory Road. I'd also want to see Niven's Neutron Star (a set of short stories that read like a novel) but despite some "new wave" sensibilities Niven comes across as reactionary today because the Tor Books revival (Forge of God and Enders Game) of sci-fi in the 1980s liked Heinlein and Niven and Doc Smith better than LeGunn, Dick, Ballard, Herbert, etc.
On the other hand, put a sci-fi fan in charge of making this list and it's no doubt they'll add a stick of books from some author who is a "no account" in literary circles like Piers Anthony -- still I would try to slip him in at his most psychedelic.