I disagree about the second statement, because both Nirvana and Foo Fighters did better stuff than Everlong. I can't think of any other slow Foos songs that are on par, but Dumb by Nirvana is, for me anyway, a much better quiet and brooding sort of piece. And the lyrics to it are so great.
But, more bands should follow the Sugar example and not suck. More bands should follow Bob Mould's model in general and not suck.