You’ve identified a lot of factors that affect the wavetables output, both on the technical side of it, and the artistic ones. I think you are on the verge, of breakthrough with that, if you press on and try other sounds and experiment. Try some things unexpected.

From others here : what other wavetable synths let you create your own tables from samples ? I think the Waldorf Quantim and Iridium can do that. What others ?