Well, if we don’t value a pleasant voice, why is there an “as if”? Or do you also think the rest of his list of qualifications aren’t maalos for a baal tefillah?
Also, the O”T is against being haughty about a nice voice, not against having one. Anyhow, a nice voice is good for nusach even without songs, so although I answered you l’shitascha, the raya doesn’t begin.
The M”B is against using niggun in a way which ruins the davening, not against its proper use. In fact the M”B is m’duyak that nigun is used for davening.
As the Briskers say, it doesn’t say in Shulchan Aruch that a baal tefillah has to have a nice voice, because if he doesn’t, then he’s not a baal tefillah.
Agav, when popa says he wants “chazzanus”, I assume he really means nusach. Maybe I’m wrong.