Tbh I never thought Howard was as good as people said he was. The true thing is that he is probably the strongest center in the NBA but defo not up there with Shaq or even Yao. How terrible can his FT shooting get? 2-10 ffs, and he isn't always as dominant as people make him to be, at least not this season.
As for rebounding, I'd say right now he's 2nd behind Love, because when I watch them play, Love hustles for every rebound, while with Howard it's like he has a reputation (which he earned the last 3 seasons) and nobody really tries to challenge him for it anyway.