What a difference a year makes! In January 2016, Congress passed legislation to repeal Obamacare, confident that Obama would veto it:

http://edition.cnn.com/2016/01/06/politics/house-obamacare-r...

Now that Republicans have the power, they can't agree on anything anymore. What a miserable bunch of phonies.

The Republicans' only position on this - one which has become religious dogma at this point, is "repeal."

They didn't prepare for a replacement because they never intended to actually replace the ACA with anything comprehensive, as comprehensive healthcare reform is philosophically anathema to them, and any language to the contrary was just lip-service to keep moderates and Democrats quiet. The Republicans probably never even expected the public backlash they got over this, but to simply strike it down and then be greeted in the streets as liberators.