Anything in the genus homo is human. That includes many extinct species including neanderthals. As far as I understand it, there is no outgrowing a taxon. So they would be human, but not homo sapiens sapiens as they're different enough to be their own species. Not sure how they would be classed beyond that though, what with the FEV junking things up. I mean, I think species are supposed to be able to breed...so I guess it's kinda messy, but from the context of genocide a humanity would be wiped out. Transformed is one way of putting it, but that wouldn't change the fact that he's going to erase their kinds, creeds, and cultures, etc. So that they 'survive' in some sense doesn't mean that the Master isn't wiping out an entire people. Memory and personality retention wouldn't change this, but that loss means that it's not even clear whether anyone is really surviving. That's a philosophical rabbit hole for sure, possibly via Theseus' ship. Which admittedly didn't incorporate mutation (of design/body plan). To me it only adds to his character, by offering an explanation for what was otherwise a set of unconnected dots. And flaws are fascinating. They create personal struggles, which are a form of conflict, that is itself the driver of narrative. Flaws are also relatable. If anything, I see it as helping him make sense as a character. Whereas, either way, his plan doesn't make much sense. Which itself still comes down to merit, because mental illness (if applicable) would not mean we can simply disregard the view or plan.