Testing too long
Dish applying for and receiving approval from the FCC to use all 32 TPs is only as good as they have a lease agreement with Bell TV/Telesat. This does not prevent DirecTV from utilizing the TPs for which they have a lease agreement with Bell TV/Telesat. The Dish application only requests FCC approval for when their lease agreement with Bell TV/Telesat allows them to use all 32 TPs which I believe is related to when DirecTV gives up there lease. I am speculating that DirecTV will probable not due this all at once but will phase in.
In regards to the DirecTV-12 launch, even if it goes in December of 2009, it will be a few months before it is operational based on the time it took to test DirecTV-11. DirecTV-12 also has a "reverse DBS" capability which I am sure will be tested as well which may increase this testing time. In addition, for the customers in the markets at 72.5 W that will be moved to DirecTV-12, they need to have their equipment, both dishes and receivers upgraded which also adds to the time.
The Nimiq 5 we are talking about here just went up 9-18 and is already in place and taking over. So the reasoning for delay of 12 to me is weak. Upgrading equipment isn't a reason to delay just an excuse. So I don't really see much of a reason to delay the switch past the 1st of the year.