I never cared about the "Smashwords edition" line, other than I had to make a special EPUB just for them. It was a very minor inconvenience to me that is now gone. I use the EXACT SAME EPUB everywhere now. Amazon, Kobo, iBooks, and so on. The only holdout was "smashwords edition."
So while I did not care nearly as much as the most vocal people, it is nice not to have that one last hold out anymore.