I have re-read your comments as well as the note you left about the MUP as it approaches Weston at Finch. I had no idea that there would be a tunnel underneath the rail crossing. Cool!

As for the MPU, it seems likely that the MPU hasn't changed significantly since last year -- there was some construction and the path was often protected from traffic via plastic construction barriers, just as you describe.

What changes do you propose? We could downgrade some sections from MPU to footpath (i.e. set "highway=footway" rather than the current "highway=cycleway"). Disabling or deleting the segments seems excessive given that they are actually used by cyclists and pedestrians, as evidenced by the Strava global heatmap.