@Anvil_DVR
Well -- testing with MGM+ and Cinemax was disappointing, as there just doesn't seem to be any way to search for channels from either provider in the Live TV Guide. Starz on the other hand, is searchable and tunable from that search. Seems a bit weird, but that's what we're dealing with.
It's easy enough to tune a small list of LIve TV "favorite" channels, but to do this reliably takes about 1 second per move through the guide -- so after moving through 20-30 favorites, we're probably getting too slow. Overall, I think it's probably a bust, as you have a lot of premium channels.
You'd be better off I would think adding these premium channels to whatever streaming service you decide to use as your go-to. DTVStream would be one option, but I think most have these same premium channels available.