Yeah both episodes seemed somewhat flat, esp in terms of Amy & Rory. It's like they know their time as companions is coming to an end , and have short-timer syndrome .
I liked The Power of Three, although The Doctor's overly-melodramatic heart attack was a bit much. And I'm really tired of Amy and Rory Pond (why did Rory take Amy's last name?) and wish they would just go away. They're as annoying as Adric (times two!).