The reneging on the biggest promise the Pubs ran on for 7 years, elect us and we will repeal obamacare, is going to hurt the Pubs. The SCOTUS is "safe" for now so that's not going to be a rallying point. Tax cuts are not going to be a big deal to most voters, since most don't pay any. The only thing working for the Pubs is the Rats. They are so radical and strident that a lot of voters won't go back to supporting them.
I think the Pubs are on the verge of throwing away the massive shift that has occurred because of obama. They gained the House, the Senate and now the Presidency and the end result is the only difference between them and the Rats is they will move us to the left a little slower than the Rats.