again...

No one would ever use a varispeed effect to pitch a vocal higher or
lower or tune it these days. So let's get that straight - repitching,
time stretching, and tuning audio are the province of Auto Tune and
Melodyne. Melodyne is the superior plug-in by far. Everyone I know
who does audio work uses it and long ago stopped using Auto Tune.
Here's the second point - and Harley, this is for you - if I used
Melodyne on a vocal track you recorded and just tuned a note here
and there, it would not sound like an effect. It would just sound
correct. Not that you'd need it, of course. But I've
done some metal and hard rock projects where I used Melodyne to
fix vocals, and I never told the band, and they never brought it
up. The comment was more like, "dude, my vocal sounds awesome".
I've "fattened up" metal guitar tracks with sampled guitars run
through amp simulators. I've replaced many a crappy recorded kick
or snare with a sample. I've made a metal song's chorus "bigger"
by adding a synth pad in the background to augment the guitars.
All this was done to make the recording the best that it could be,
and at no time did I care about whether it was "honest". And the
bands were never the wiser. They just thought it sounded great.
You do what you do to make the recording happen. "Well, we don't need
tricks, we're so bad-ass"...that is precisely the reason I got sick
of metal bands. It's a narrow-minded, proud-to-be-stupid attitude
that doesn't really serve the musicians themselves in the long run.
If all you will ever do is metal in your life, fine. Me, I wouldn't
have a house or any money if I had restricted myself to one genre
as a producer. Especially the metal genre.
Producers and engineers don't bite the hand that feeds. If tracks in
the tune need fixing, then they need fixing. It's great if you
are such a monster musician that your tracks don't need any help, ever.
Personally, I've never run across one track in my entire life that
didn't have an issue of some sort.