[ancarda]

I don't see how that affects the API.

    [API] --> [Skype] --> [Other Skype Clients]

Rather than:

    [API] --> [Skype] --> [Microsoft Servers]

Changing how the network is built shouldn't affect the API in this way since there's an abstraction layer (The Skype program). It would really only affect those who have reverse engineered the Skype protocol and built their own clients.

As for making Skype more centralized, yes, that will improve the experience for mobile users but it can be done without scrapping the API.

IMO, this is an excuse to scrap it and not a legitimate reason.