In my opinion Sony has a pragmatic strategy. They are attempting to get their finances in order and have done a great job by providing the most powerful console on the market while making it cheaper than the Xone.
On top of that in terms of development the PS4 is also the easiest to develop for having standard pc hardware and unified memory.
In terms of exclusives Sony's strategy is to focus on 1st party games and funding development of 2nd party games while refusing to pay for exclusives.
Considering how much easier the PS4 is to code for compared to the PS3 and that Sony's 1st party studios are arguably even better now in the long term I can see them making even more games compared to last gen.
All in all nothing out of the ordinary for a console launch and people need to be realistic when it comes to a console's game library. It gets better in time and for the PS4 I suspect in record time.
