To be fair, there’s always going to be end-user mismatches in any high-gain effect, especially for auditioning preset junkies. Gain-staging seems to be a lost art. But I wholeheartedly agree with you on sticking to a consistent baseline level. It would be useful to put together a [F]actory Preset [L]ist, and make it available here at the forum. I believe that the Preset Sharing section will only accept individual preset uploads, though.
I put together a PitchFuzz Preset [L]ist, with the Output Levels fixed at 0 dB. Seemed like the best way to go. (Many, if not all, are also single presets in the Preset Sharing area). But I imagine that there’s still minor adjustments to be made, for many rigs. An individual preset may be full-on fuzz, clean double-tracking, parallel harmonies, delay-centric, or some combination of all of the PitchFuzz features.