Give the Republican congress a break: they never actually dreamed they would have the chance to draft a piece of legislation of their own! They were so adept at sabotaging every attempt by the Obama administration, but never actually put forth anything concrete, of their own. Big boy work may be too much for them to handle.
I think they definitely never dreamed they'd be in a position to actually do anything about it. They get so much more mileage out of bitching about the ACA than they ever will out of actually repealing it. It's like in the early '00s when they held both houses of Congress and Dumbya in the White House: did they do anything about abortion like they swore they would? No, of course not -- if they did, they couldn't use it in BIG SCARY CAMPAIGN ADS anymore.
Governing is much
more difficult than preventing governance from happening. They can't piss and moan when they hold the executive and have a legislative majority.
Me, I'm making popcorn and settling in to watch the carnage. They've run all the grownups out of their party so they haven't anyone left who actually knows how to get things done, and I'm going to watch them flail all the way down the toilet.