Emmylou Harris Covers: Good and Bad?

I really like everything country on her "Roses in the Snow" ablum, especially "I'll Go Stepping Too" (that was Flatt and Scruggs originally?). I hate all her rock covers, really, I havent' heard the original versons of all of the rock songs but I can tell the rock songs from the country ones because she does them all terribly! ESPCIALLY the Beatles songs and "The Boxer" the one song on "Roses in the Snow" that I hate.