I think MP pulled the plug. All the albums that were removed were those that they own their own rights too. The Voices stuff is still there for obvious reasons, while LLM and HMF are licensed to Rune (which btw are also removing all their stuff from Spotify January 1st 2011)
The so called “bad quality” is no big deal for me anyway, I listen to music mostly on cheap phones, with traffic noise, colleagues or computer sounds in the background. The alleged bad quality of the streams is just a small factor among many in my opinion.