Of course AMC-14 does not have to be launched to start the new system. If they get E11 up successfully, they could then move E8 and E6 to the new slot (lets say 97 to only be 13 degrees off footprint).
E8 could use the spot beams taking 5 CONUS TPs, and between E6/E8 have 27 CONUS TPs.
Compare that with 110/119. 49 TPs (one leased out for distants), 15 used for spots, yielding 34 CONUS TPs. 3 (?) being used for HD. This yields 31 TPs of standard definition. If they get 2x the channels/TP with MPEG-4/8PSK lets say 15 TPs carry all the non HD content of 110/119. That yeilds them about 12 TPs of space left over. At 6 HD/TP that would have capacity for 72 national HD channels.
So, optimistcally with just E11 going up they could have the entire system (CONUS not LiL) with room for some expansion. The question will be how many of the E8 spots will be useable. They had capacity for 25 downlinks in the past, but that included AK/HI and PR. Best case would be 25 useful downlinks, maybe LiL HD for some cities major nets (ABC/CBS/FOX/NBC/CW/PBS), and of course they would have to have the standard def too of other locals.
When AMC-14 finally gets up and usable that will give them 32 more TPs CONUS, which I am sure they will use a lot of them for LiL since they will want all the major DMAs covered, and still have some for HD expansion. Then in the future they can launch a spot beam satellite to the same slot to offload the CONUS LiL to spot beam. A nice growth plan...
It is of course just speculation at this point, just based on E11 and AMC-14 going up this year.