Umm, Love puts up a TON of shots for a bench player. Neither Wade or Windler are allowed to do that. I know Kevin's role is to provide scoring in the 2nd unit, but he's just as trigger happy when he's playing with the starters. Nothing wrong with that if you're hitting, but right now he's a bad jump shooter who does little else.
He gets defensive rebounds because he's the only big who stays parked under the basket instead of closing out shooters (which, incidentally, is something he WAS doing early in the season).
Offensive rebounding is what really matters in this league, and Love hasn't been an offensive rebounder for at least 5 years.