Perhaps if the mechanisms by which these goals would be achieved were made clear to us, people would be for it. The fact that any details can't be shared(because they don't exist) is illustrative of the fact that there is no real plan to fix these issues while maintaining coverage of pre-existing conditions.
I don't think it's true that "details can't be shared(because they don't exist)". It is a political imperative for Republicans to repeal the ACA now, and worry about replacing it after the positive PR. Without doing that, Democrats have no reason to come to the table to work on bipartisan reform (not that Republicans necessarily want this), and any replacement will be spun as a minor modification to Obamacare, which causes big political problems for the GOP both among its base and among swing voters. Details of a replacement aren't being shared right now because it would be tactically damaging to Republicans and Democrats don't want to attempt reform.
It's difficult to express sympathy for Republicans' political imperative to destroy healthcare coverage when the only thing that stands between it and people dying is... a Republican promise that they will expand healthcare coverage with a secret plan.
The top two Democratic presidential contenders as well as many of the Democrats in Congress campaigned on specific reforms to healthcare. The thing is, Democrats and Republicans have nearly diametrixally opposed goals in reform.
I'm coming at it from the other angle. Republicans know they're stuck with an intractable problem. You can't cover people with large costs without raising the costs for everyone. The problem for Repubs at this point is that those with large costs have already been granted access. It's much easier for them to deny those with pre-existing conditions access than it is for them to now take that away. Futhermore, Repubs can repeal ACA without Dems help but can't pass a new bill without Dems. I believe the goal at this point is to repeal ACA without Dems then push a hyper-partisan ACA replacement which the Dems will not vote for. Then Repubs can successfully lay the blame at Democrats feet for not coming to the table and passing the replacement.
I mean it's been the primary campaign issue in 2010, 2012, 2014, and the non-presidential 2016 races. Not repealing Obamacare would be a political catastrophe for them. If you haven't noticed, it's also the very first item on the docket of the new legislature too. It's very, very important to them.