That tracks with several of Bulhman’s interviews on Know Direction. They favoured backwards compatibility whenever possible.My recollection is that it was sold on the premise that a lot of gamers want to keep using 3e, so let's keep it in print with a new coat of paint.
The Pathfinder RPG wasn’t published so much to “fix” the rules as provide an in-print game system for their adventures. The APs were initially the priority. (But that kinda faded away as the ruleset took off.)