This is a very well thought out post but I think you're missing the point that peppy/tom made. Touchscreen players get bad accuracy because of latency issues, not inheritly because touchscreen is bad at acc. Solving the problem using accuracy curves is hence only a short term solution. Eventually someone will be able to do this with touchscreen and get 90%+. Do we keep shifting the threshold for receiving pp further and further back until anything less than 98% is discarded? Axarious' Kuchizuke Diamond play is only 93% acc. What happens when touchscreen players start getting 93% acc scores? Do we just throw away axarious' play, despite it being insane?I agree the playstyles are just too different to cover for both, however I don't consider the fact that touchscreen players are able to set insane scores an actual "problem". If a touchscreen player would turn up with a 90% play... that would be insane and admirable, at that point I could hardly call it problematic and the pp would be more "earned" and "deserved" than it is now. Shifting and adjusting accuracy factors would be a one-time change, but at that point it would be more about opinion and perspective I would say.
I'll say it again, touchscreen and tablet/mouse can't be compared. People need to stop trying to compare them.
I think it would be a step in the right direction as a basic concept, and can be improved further as needed.
Your argument is valid though, since it's more of latency issue for touchscreen than actual player skill that hinders accuracy it's not really a great solution in the end but it would put the problem at hand into a more acceptable relation.