I think in order to get to the reconciliation, the Senate would have to first pass a bill that would survive a legislative veto; thus, Republicans would need Democrat votes to even get to that step. I may be incorrect on this, but if that's the case, the Democrats should not support any version, because if they do, it will allow for reconciliation to take place, after the House has altered whatever protections Democrats demanded. Of course if the choice is to have bill that lets people die and one that doesn't, the Democrats should get involved, but I don't think that will be the choice. To be clear, my recommendation wasn't motivated by political optics for Democrats, rather to prevent the bill from going into reconciliation, and thus retaining Obamacare.