Just tune down 1/2 step. The better the pitch shifting, the more the latency. It's a perceptual process. There is no mathematically perfect way to do it. Also, when you pitch shift, the sound coming from the speakers doesn't reinforce the strings (since it's at a different frequency) so you don't get sustain and feedback harmonics.
I’ve had the II, ax8 and now the III, I find it’s already improved a fair bit
I don’t notice a huge difference between my DT and whammy Ricochete, so where I’ve listed the pedals for sale. Neither sound all that perfect, and while the III certainly isn’t either, it’s close enough I don’t think I could tell them apart.
I find a down tuned guitar certainly sounds better with zero artifacts, latency etc.
You mean a physically downtuned guitar? Or the 1/2 step downtuned patch?