Does anyone have insight as to the effect other green rating systems had on LEED v4?

The reason I ask is when CalGreen was introduced, in comparison it appeared to be LEED on steroids. Other green rating systems, not so much, but most have some redeeming qualities. USGBC seemed to embrace CalGreen, stating this will allow them to put more focus on developing LEED and raising the bar. And LEED v4 certainly does raise the bar.

There is much to like, such as the new Location & Transportation (LT) category, and my favorite being the Integrative Process (IP) category. There is also much not to like, such as pre-2009 APs being kicked out of the IN credit.