Making a few assumptions:
1. Sea Launch launches E11 sometime in April/May
2. In orbit testing etc makes it June/July available
3. They replace the spot capacity of E7 at 119 with E11
4. The satellite is as least as advanced as E10 (supposed to be more advanced)
Dish could move the HD LiL off of 61.5/129 and put on 119 on spots. They could also add a bunch more HD LiL to 119 spots.
This would give them about 5 TPs free on 61.5 (more on 129 but have to have mirrored under current set up). With 5 TPs they could do 15 channels of good quality HD or 20 Channels of HD lite. Without having to really change a thing elsewhere.
Now if they wanted to go all out HD lite they could add more HD to existing TPs that only have 3 channels on them. And they could force the MPEG-2 HD to MPEG-4, making the 6000/821/921/942 obsolete for HD.
Making all the above happen would probably allow Dish to squeeze on 40 more national HD channels. They would probably be able to carry the top 75 markets in HD on spots (a lot less than DIRECTV but covers most the population).
Question really is how long until they need 40 channels of HD?
Dish really needs Ciel-2 to get up to add a ton more spot capability to 129 (not to mention fix the reception problems people have with 129). With Ciel-2 I would speculate Dish will be able to provide LiL HD to the top 150 markets.
Hopefully Dish will file their E11 application to the FCC next month so we can finally see how much spot power E11 will have. If it is as good as E10 was with TP reuse and sticks to the 5 TPs that E7 is using it could get 50-60 spots, that could mean 40 new HD LiL markets.
A few comments to your assumptions/ideas. I think it would be a waste for Dish to only dedicate 5 TPs to E-11 for spotbeams since E-10 uses 10 TPs. The reuse capability goes way down with only 5 TPs to work with. Dish should move the 3 TPs worth of national HD off of 110 W to 61.5/129 and move 3 TPs worth of SD programming from 119 to 110 so E-11 could use 8 TPs for spotbeams. This would give Dish significant capacity for HD locals.
The capacity at 61.5 W is the problem and the failures with E-3 makes it worse. Currently Dish uses 4 TPs for HD locals at 61.5 W but also has 3 TPs that it can't use because of E-3 failures. There is probably room to free up another 3 TPs and maybe more if Dish gets FCC approval for regular use of TPs 23 and 24 and some of the internationals could also be moved to 118.7 or 121. Dish does need another satellite at 61.5 W and E-6 is just sitting there as an in-orbit spare at 110 W.