my most consistent cscorer over the last seasons is a PF with driving 3, and actually his low Rebounding rating from 14 is painful in a weaker competition because i get regulary outreboundet by huge margins(over 20 off rebs from the opponent, when they lineup 16-17 Reb centers/pf)
So i won't imagine when you lineup centers who get easily dominated from my 13/14 RB big guys, on a much stronger competition you need a lot of scoring and defense to fight those weakness.