Note that it rewrites them to YOUR version of goodness, even if their own worldview was different along the ethical axis. An eladrin using this would turn a LE green dragon CG. That's one argument for its brainwashing nature.
Besides the fact that the spell description is pretty much just a description of brainwashing?
If you're not charming as well as dominating, you're clearly not intending on keeping this minion.