I suspect one of the reasons to, finally, put the stations on 61.5 even with just 1 HD uplink is due to new customers, even SD customers, they can just point them to the EA and hopefully not have to worry about the dish side in the future, even when they upgrade to HD.
As a current customer, it will require a new dish at 61.5 or a whole new dish (which, right now, Dish isn't offering to existing customers).
NBC and CBS are the ones I need over dish the most, since with my antenna, sometimes KAUZ doesn't come in well. Some show earlier this week, again, was unwatchable. (this could be KAUZ, maybe next year signal strength will go up).