I don't think this means anything, another empty threat as Bohner has a history of caving.
The reason why Dems would change those rules now is to embarrass the Senate R minority by pitting them between general voters and their primary opponents in an attempt to keep the Senate in 2016.
The Senate minority would have to really filibuster on public display to kill a bill with <50 unless they had significant Dem defectors, That would be used against them in the general election, And Reid is great as forcing those votes
If I were in D.C., I would have DESTROYED Reid by now. The R’s are cowards.