The problem is that the GOP leadership is stubbornly trying to appease a portion of its base that SHOULD NOT BE APPEASED on OBAMACARE (corporate America), and even more stubbornly trying to do it by completely excluding any Democratic input.  

They're so opposed to DEMOCRATIC input, the last 2 significant "repeal" vehicles in the Senate were not even shared (in either substance or form) with members of their own party!!! - "who got the power?  I DO!"

McCain, Paul, etc. CANNOT come up with an alternative if they are never made a part of crafting any proposal at all.

Neither can the Democrats.

There is a competing bill that COULD be considered and worked over to reach a bipartisan solution.  That's Sanders' bill.  Extreme certainly, but a vehicle, in order to arrive somewhere in the middle.

The GOP response has been to oppose and dismiss out of hand.  Not only no hearings to talk about things, but no show to EVEN THEIR OWN PARTY MEMBERS as GOP vehicles get drafted.