williams gets a bum rap cause he was picked ahead of paul and deron he is decent rebounder for a 3 and had quite good shooting percentages(TS% 54), although he did score at a below average rate compared to other sf.
of course his not worth 8-9 million, but he is pretty decent, if jeff green rebounded and shoot as well as williams i would be happy
Harris is slightly above average, he shoot it well last year when he started to take fewer shots, but it is easier to find pgs with harris production than sf with williams production.