Not to worry, I think most of the GLEEKS will stick to the Glee tours and leave the real thing for the rest of us.
Call me Scrooge, but much as I love Kristen Chenoweth, I find most of Glee pretty annoying and would've liked them to leave this album alone. I don't really care that it promoted Rumours. Rumours doesn't need promotion and has always done just fine, thanks very much!
Thankfully I don't think any of the renditions were really good enough to eclipse the originals in the eyes of viewers, unlike poor Don't Stop Believing (it always irks me when people say that's "a song from Glee".)