The promise was to REPEAL and then REPLACE; and that IS a viable option. So far...repealing bits and pieces is what the House has proposed. The Senate IS coming up with their own bill; those in charge are Collins and Cronyn. Collins wants to fund PP and Cronyn wants to fund pre-existing conditions.
Actually, the promise was to repeal AND replace. Repeal alone would throw coverage and access into chaos. It simply is not going to happen.
There will be pre-existing condition coverage ... the Senate will not pull this one. And for the rest of what the conservatives in the Senate want, I quoted Cruz almost verbatim in the post you're responding to.
As for Collins, she may be able to fund PP as the Governor of her state .... but this will be an intense negotiation.
It will come together in conference and it will pass ... even if it takes Pence to cast the deciding vote in the Senate.