I think Scalia would approve of him not being replaced and not for any political reasons, but because...

I think Scalia would approve of him not being replaced and not for any political reasons, but because an evenly balanced Court depoliticizes the Court. No one was more bothered by the Court being the place of last resort for a group of people to thwart the will of the majority (except, of course, where legitimate constitutional rights are at issue, which is when the minority should prevail). The current situation means that we get to govern ourselves a bit more, which, on Scalia's view, would be a good thing.