If I recall, didn't E5's troubles begin during the move to 129? Is there any reason to believe that it might function better at 148? (I'm glad that 148 isn't something I'll be concerned about after Ciel 2 is up and working and I contemplate coming back to Dish.)
E5 at 148 will probably be in a inclined orbit to save fuel. Probably nothing for consumer use, just a license holder and of course the engineers play toy for testing new encoders and such.