I see your point. In my opinion, it'd wouldn't be much different than the PitchFactor's H910/949 Speed / Scale selections. CHROMATC being quantized to a note value, NORMAL being a fine-tune mode, and MICRO being range-limited fine tuning. But that's an (expanded) emulation of classic hardware.
With the Resonator, you're 'selling' resonant delays at specific tuned pitches that correspond to note values. So – even if it's all milliseconds underneath – it's labeled to solidify the idea behind the algorithm. Certainly the gesture that switched between 'Notes' and fine-tune mode would have to be a deliberate one.
I'm looking at this from the angle that Resonator could significantly expand its feature set with relatively few changes. I suppose that fine tuning would fit the paradigm better if it were in 'cents' / percentages, but that would kind of defeat the purpose of ultra-precise millisecond adjustments.
Once more people get their hands on the algo and explore it, I'd be interested to hear what those end users might think. I may very well be in the minority on this (and it wouldn't be the first time). I tend to push the limits of my equipment. Thanks for the consideration.