Would these waterways be better tagged as streams?

Welcome to OpenStreetMap! I think historical performances at venues may be outside of the scope of OSM though.

Does the US have Living Streets? The wiki seems to limit the designation to streets whereon cars legally must yield to pedestrians. highway=living_street#United_States

If you look at the Mapbox imagery, it appears the road no longer crosses the railroad tracks at Maple Hill Road. At best there is an unofficial footpath. IDOT has been reducing the number of crossings.

Ah, okay.

I think Clark Street has bike lanes for at least a portion of it.

Thanks! Incidentally, you can mark tag private roads as a "Service road" or "driveway".

Thanks for Relationising this. Why did you change this route from Primary to Secondary? I believe this is still the preferred non-Interstate connection between Bloomington-Normal and Chicago.