I haven't been reading it lately, but I completely disagree. I think Slott is one of the consistently strongest writers in comics these days. His sadly brief tenure on Avengers finally gave some life to Hank Pym, moving him out of the realm of also-ran or depressed former wife beater to a great science hero. His work on She-Hulk was a wonderful mix of humour and legal drama that showed the strength of She-Hulk didn't just lie in her strength. Arkham Asylum: Living Hell is a very cool look inside the world of Batman's villains, introducing a bunch of cool new ones (including a great one with a lot of potential that no one seems to be able to make work).
And I think he is my favourite Spider-Man writer of all time (with Mark Waid and Kurt Busiek coming pretty close). I think One More Day was pretty stupid (so much of what was needed to undo the marriage and identity revelation could have easily been done without a magic wish), but I think what came after was pretty great thanks in no small part to Slott, who provided a rich supporting cast (for a long time, it seemed Spider-Man's world became very insular and didn't balance the Spider-Man/Parker stuff), great new status quos (J. Jonah Jameson as the mayor of New York is a brilliant move), some good villains (Mr. Negative is definitely one of the more interesting would-be Kingpins I've seen), and most importantly a sense of tremendous fun without lessening the stakes, which some writers just seem to forget sometimes.
Personally, I think the new Spider-Man sounds interesting. Largely, because I love stories of villains put into the shoes of a hero and it changing him (which is what the preview seems to imply). Reminds me of the early issues of Thunderbolts and the Buffy the Vampire Slayer 2 parter where Faith switches bodies with Buffy. It's been a while since I caught up with Spidey, but I am rather interested.