Look at two things, both the team overall rebounding rating, its not useless... but second order I would look at the opponents starting players and see who gets more rebounds, and assume that they are the stronger rebounders, and think about setting your lineup in a way to minimize that difference.
we made the new rebounding formula more a function of individual matchups, looking just at the team ratings is a bit crude. Look at who specifically got all the rebounds in those games and who they were boxing out against.