I have more questions than answers...
How many possible seats can the R's grab in the next election cycle?
Is it enough to mount a majority position?
If R's had a majority, what would they do with it? .... This is going to depend on what promises they campaign on this coming year...
Do they really need a super majority to get this fixed? [Can they force Obama to capitulate with a simple majority?]
Speculating...
The Rs made a position of repeal and replace in 2012. It wasn't successful (Romney decisively lost). It wasn't a failure (R's picked up House positions IIRC & continously poor polling of Obamacare). I think they will stake out the same position in 2014, because of the freshness of that position. Also there is general fear of having no gov't guided insurance scheme; because honestly, sadly, America still isn't converted to libertarianism, (especially not an-cap) despite the object lesson of Obamacare.
So what plans do R's have on the shelf for a repeal and replace scheme? Has Ted/Paul/McCain floated anything substantive? What does that look like?
The boldness of the R's with their planned changes will depend on the 2014 election resut.
*If the results are a timid improvement for Rs, I would expect some revision to existing ACA. A compromise hammered out by a centrist like McCain or similar. Do we know what these existing plans look like?
*If the results are a resounding rejection of Obamacare, I would expect bolder support of a radically revised plan by a Cruz or Ryan or Paul of the party. Do we know what these proposals look like?
Lets say they get a bold win across the country. Not enough seats for a super majority but a very loud and clear win. Lets say they won on a "repeal and replace" theme and promise. And they move forward with a radical redesign (like something closer to what Romney proposed), not a compromised adjustment to the current law.
A big question is if they can force a capitulation by Obama, resulting in his humiliation. I think if they play their cards right they can. All they would have to do is not pass any fixes that Obama wants. So all the screw ups in the current law remain, until the R's get what they want and Obama submits to it. Now, that doesn't mean there wouldn't be some token compromise to get his signature, but they will be face saving items, not substance. I bet a good bill by the R's could get bi-partisan support and override any veto. If they play their cards just right.