This will only affect the CBS O&O's, not Viacom, which is NOT under the CBS umbrella/ corporate flow chart. Les is sounding more sane because of the basting CBS took when they suffered from not being on TWC during that recent dispute. Most of the losses were from the local programming, especially local news was, in some cities, absolutely decimated in the ratings. This is the life blood for the locals, even the O&O's, not so much the prime-time shows, which mostly benefit CBS corp, although having their flagship stations off of TWC did have an unmistakable effect, the drop of revenue at the O&O's was crushing.
The TWC dispute hurt CBS far more than it hurt TWC, and I don't think Les wants to have to expose his O&O's to that again, only to agree to deal pretty much as TWC had been willing make in the first place, not CBS's. However, Les is still saying publicly, as per the article via the link provided, that he will not allow the Auto-Hop feature. That is a doomsday remark and from a point that is anything but "open." However, time, it seems has softened Les' rhetoric and there is still some time before negotiations with Dish for Les to find some other way (living with Auto-Hop and not demanding an outrageous sum in exchange for Auto-Hop to stay) to a deal where CBS O&O's aren't off of Dish for any period.