"A while" before they launch D14 and get it operational?
I suppose that's a relative assessment. To me its' been "a while" since they added bandwidth with D12. Years.
With D14 likely on line in a year or less and considering the UCR timelines associated with the rollout of a new bird I'd be inclined to characaterize that with the dreaded "soon" label.
If DirecTV were going to pad bandwidth with bit starved feeds the time to roll that out would have been several years ago when they were entering into the long lapse between scheduled launches. They apparently were comfortable playing the cards they had.
And if the last few years have led me to one conclusion it's that DirecTV still has the ability to add channnels without taking the measures you suggest and have not been prevented from adding any content that I am aware of. The hardest part about adding a channel isn't airing it. It is getting it all in writing. The infamous "tango" involved in negotiating a carriage agreement. Thesimple broadcasting of programming isn't the only dog in that fight any more. DRM of the content is equally (and possibly soon to be more) important.
I don't believe that there is a backlog of channels just waiting to light up were it not for the limited bandwidth available. What you propose is, in my opinion, unnecessary.