Wouldn't the arcade mode leaderboard be better when the runs are every arcade route instead of a single route chosen by the runner?

It would be better and make much more sense. There are two possibilities: complete every path in arcade mode meaning 6 times 4 tracks or every route in arcade mode so 10 times 4 tracks.

Oh yeah, there seems to be no consensus on this, since some people tend to disagree on the run's completness if you decide to only do a single path from start to end (meaning just 4 races).

To put a definitive end to all these doubts i'd propose to make all of these valid categories on their own - the most basic single path run, all paths, and all tracks, totalling 3 subcategories for the arcade mode. Thoughts, guys and gals?

Sounds good to me