I reverted this in 51014800. I reviewed some roads you changed in 51015531. Blair Mill Road and Dresher Road are higher traffic and should be tertiary. I also made some of the roads in shopping centers unclassified/minor.

See changeset #50872893

Can I ask for a reasoning for your mass demotions/promotions of road classes? You changed PA-611 to primary when it has been listed as a trunk route for 6 years. What's even stranger is that you left the northern portion in Warrington as a trunk road. I feel that PA-611 is on par with PA-309 (also a trunk road) and is a more major route than other Pennsylvania state routes it intersects (like 263 and 132). Mapbox uses this data and you shouldn't demote major roads without discussion on OSM forums.
You also promoted many smaller residential roads to tertiary (which may be fine), but you only partially promoted the road while leaving other sections residential. You also made the entrances to shopping centers tertiary class and a car wash service road(?!) tertiary classes when they should have been left as service roads, driveways, drive-throughs, etc.
Lastly, when you were changing these entrances, you left the PA-611 line jagged. iD and JOSM include line straightening tools that you should use.

I've also noticed that you have been making similar road demotion/promotion changes throughout the northeast. Are these being discussed with anyone?

Please make edits and in the future, PLEASE add a comment on what you are changing.