Hello,
The H3000 Factory MKII plug-in models the Patch Factory and Mod Factory algorithms from the H3000. While these algorithms do feature pitch shifters, they do not offer the key/scale intelligent harmonizing features of the Diatonic Shift algorithm. Sorry that this was not clear to you.
I will say that there are many situations where fixed interval harmony can be useful. Octaves and 4ths/5ths are easy for many sources, and other intervals can create unique effects that you wouldn’t get when quantized to a key/scale. The detuning and micro shift presets are also very useful on a variety of sources.
You could always try something like combining the key/scale harmonizing using Quadravox and then adding some detuning or modulation from the H3000 plug-in to add a little bit extra that you wouldn’t get from Quadravox alone.
Let me know if you have any other questions.
