I still believe the P2P version of Skype was better. Centralized Skype may have more features, but the P2P version of Skype was better at the core functionality of video and audio calling. It was also more private and secure, since your calls were not routed through a central server.
The change to centralized servers was done because more and more Skype users (P2P nodes) were/are running on bandwidth and processor constrained mobile devices.
It also just so happened to align with the acquisition by Microsoft and resulting support for “lawful intercept”.
