Absolutely agree on the dumbing down. I'm guessing it's getting heavy use, for many it's probably the default thing to go to - so an easy target for cost optimization.

Mine will randomly go "Here's some driving tunes" while I'm sitting still, or introduce to me to "The Kings of Leon" when I have some of their songs liked and in my playlists. It's pretty clear there's not a lot of my data in the the input context, or it's not been improved over time.