Judge's and Treaties are the only reason Dingy Reid would do this. With a Republican House, no legislation is going anywhere. Absent the filibuster, we could end up with Van Jones on the Supreme Court and a UN Treaty banning firearms.
I also suspect Reid is willing to do this now because he knows he isn't going to run again.
Question is, will he find 51 votes?
Easily. They're democrats, and for them the party is First and Foremost in their lives. Some will express a few misgivings, but they'll be whipped into shape. This is going to happen.