My point was that the President would certainly sign a straight-up repeal...
You're probably right. Trump will sign anything they put in front of him. And if it's a straight repeal then the Democrats haul out clips of Trump promising repeal and replace. If it's repeal and replace, then regardless of which version of Trumpcare the Republicans settle on the Democrats will haul out clips of Trump and Price promising how deductibles will be reduced to a pittance, rates will plummet, every single person in the country will be covered, choices will go up, service will improve, and not a single person will be worse off. They both have overpromised this to an extent that would have made the Democrats blush in the Obamacare selling days. And it's going to come back and bite them.
President Trump would sign single-payer at this point, I think. He will sign ANYTHING that allows him to say “Obamacare is repealed” and “Everyone is covered.”
And Trump's response to the Senate vote was to congratulate American people, "because we're going give you great health care." So he's back to wanting Trumpcare again.