Unless you explain to me how the length of time matters, I don't see how a recess appointment during a three day recess is any different from a recess appointment during a two week recess.
And spare me the "circumventing the Senate" bullshit. The Republicans have turned the Senate into a supermajoritarian body for pretty much all Senate business. Under the circumstances, where the Republicans have resorted to unprecedented tactics to block everything, the President taking unprecedented actions in response shouldn't be surprising.
Moreover, the NLRB and the CFPB cannot legally operate at present and the President is barred from faithfully executing the law. I don't see using constitutional means to achieve constitutional requirements as problematic. I think recess appointments as a general matter are a bad idea, but I don't think they should be prohibited (as the House has tried to achieve).
