As far as Bodom changing their lyrics to sound more like, let's say ratt, winger or stryper would inevitably cause all their fans to mass suicide. But yeah some songs could, MAYBE, be changed slightly to Slayer, Paradise lost or what the fuck ever your flavour is. Personally I don't think Alexis voice is what lifts the band to its full potential so why bitch?. You want good singing check out Evergrey. End of Story!