There will always be eeyores about the empty half of the glass.
*sigh...*
You're right.
Except, in this case, anything less than a full repeal of ObamaCare is stepping-stones to a "single payer" (socialized) system; this in turn grants government the ability to grant or withhold care at will (and, being honest, pissing off or offending a petty bureaucrat is a great way to get bogged down in minutia and jumping through hoops)... that doesn't sit well with me.
There's also the fact of ObamaCare being contrary to the Constitution, as nowhere in Article 1, Section 8 is the Congress empowered to enact such a law. (And simply amending it is an implicit acknowledgement of its authority, implying that congress is not limited by the Constitution.)