Republican voters mostly aren't against it for reasons other than the fact that it was championed by the black Muslim guy from Kenya. They don't like the as-yet-unenforced mandate, and they don't like it for all of the reasons that few people actually like our health care system - at best it's needlessly a pain in the ass, at worst, well, you know the worst. A lot of them are pissed off because they think the blahs got the secret welfare ACA (Medicaid) while they got Obamacare (the exchanges), even though a big reason (not the only one!) a lot of them didn't get Medicaid was they yelled and screamed for their states to "reject Obamacare" and, thanks to Roberts, what they could reject was the Medicaid expansion.
Hospitals hate the idea of repeal. Insurance companies mostly don't like it. For people with employer insurance, people who got Medicaid, and people who can kinda sorta afford the individual plans, it's mostly better (and since the mandate isn't even enforced, it's basically better for anyone who chooses to buy it).
Ultimately any "Republican healthcare plan" is basically Obamacare, but shittier. Even my glibertarian college facebook friend who HATES OBAMACARE earnestly described what the health care system should be, and it really was Obamacare without the mandate, to the letter.
The sociopaths in Congress wants to take away Medicaid, make it less affordable and with fewer benefits (at worst, completely fake insurance, at best something slightly better than that). Remove revenue from insurance companies and hospitals, including forcing them to eat more emergency room bills. Oh, and people don't get needed care and go bankrupt and die.
The leading liberal think tank has decided to make another stab at bipartisan fixes to Obamacare because I guess whatever was in the water that made Obama think elected Republicans were interested in such a thing is still in the water in DC. I'm not sure why "here's a really complicated plan that people won't like much more than the status quo and has no chance of passing" is better than "here's a really simply-sounding (nothing is simple, of course, but the bureaucracies should handle the bureaucracy, not us) idea that would be popular and better and universal and has no chance of passing right now" but centrists gotta centrist I guess.
