I don't really like the idea of buying up studios but Microsoft has pushed things in this direction. A response of some kind makes sense.
However, I'd much rather see them start their own studios or buy small studios that are really looking to take off and need a financial boost. Buying up large studios like Insomniac really does very little for the consumer.
At the end of the day, though, it's up to the owners of those studios if they want to sell. I can't blame either party for coming to a financial agreement.