I agree with you although I was less inclined to continue subscribing. They just had nothing real to offer. The sound quality was much better than FM, but the offerings were very little over what I hear on the radio.
For example: the 80s station played Duran Duran (some of their worst stuff, incidentally) plus a lot of nobodies. I swear to you I heard a ton of so-called music I haven't heard before on there, and if I can out in the '80s and I'm not familiar with it, it wasn't worth anything. Not saying that I had to like it, but I heard virtually everything that came out that sold more than, say, 100 copies. I would listen for a couple of hours and not hear a song I was familiar with.
I had the same experience with the '80s channel. My impression was that it had a "real" '80s playlist for the first 6 months I had the service and then switched to a "any junk we can find recorded between 1980 and 1989" playlist.
Still, the occasional trips to the Bluegrass and Alternative (Lucy, Fred) stations would have made it worth renewal at $8 or so bucks a month. A bit more if they had added a dedicated Louisiana Music Channel (New Orleans-style jazz, Cajun, Zydeco).