If I laid out a full plan and you were against it and had 7 years to come up with a better plan do you think that if you actually had any desire to come up with a better plan you could do it in that amount of years?
There is no replacement for Obamacare outside of single payer that is "better." Furthermore the Republicans really never cared about making American health care better. Obama basically took one of the ideas from their think tank and implemented it and Republicans rallied against it because Obama suggested it not because it was bad policy. Their anti-Obamacare crap was political propaganda aimed at attacking their political enemy. in fact when you strip Obama's name from the bill and lay out all the benefits of it it's overwhelmingly popular.
They've had long enough to plan out something "better" that if they actually ever wanted to do so it would be done by now. Even looking at all the ideas they float now all leave millions uninsured. This is a prime example of the chickens coming home to roost. Their propaganda was so effective that now they have a mess on their hands they can't clean up. They passed all those repeal bills because they knew Obama would veto them and as soon as the threat of the veto vanished people in their own party are propping up what they supposedly wanted to repeal.
They literally HAVE to come up with something in conference so it's kind of mute point.