I have changed the roads back.
See: osm.org/changeset/95066629

Reasoning:
CA 1 should remain classified as a primary throughout its track. Yes it connects various cities similar to a roadway, however, these cities are too close together and have various speed limit changes as you approach/are in them (particularly Half Moon Bay).

A good example of a road that *should* be a trunk road in the U.S. is US 41:
osm.org/relation/2304382

If there are any other major road classifications that you have changed, please share them so that they can be reviewed accurately.

Okay, thank you for changing it back.

Why did you change Way #116025903 into a motorway link?

Why did you change these highways to trunk?
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Published using OSMCha: https://osmcha.org/changesets/94224037

Not saying its bad, but why did you change it to landuse from building?

Please do not overlay buildings without specifying their height properties. These elements at the top seem to be air conditioning units. You can delete those next time and just keep the who building mapped like you did.
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Published using OSMCha: https://osmcha.org/changesets/94207221

Please do not overlay buildings without specifying their height properties. These elements at the top seem to be air conditioning units. You can delete those next time and just keep the who building mapped like you did.
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Published using OSMCha: https://osmcha.org/changesets/94207221

Please tag this as a park (done).
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Published using OSMCha: https://osmcha.org/changesets/93947541

Proporcioneu una etiqueta source = * per als edificis i altres elements. (traduït de l'anglès)
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Published using OSMCha: https://osmcha.org/changesets/93947551

You messed up road WAY: 259412746
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/93947594

Please square the buildings you are mapping by selecting them and pressing Q after you map them. This makes sure their outlines are accurate.
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Published using OSMCha: https://osmcha.org/changesets/93727202

Bueno edit y tag.
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Published using OSMCha: https://osmcha.org/changesets/93633206

These buildings are very poorly drawn. Please try to use the Square feature (press Q) to make the corners of each building square.
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Published using OSMCha: https://osmcha.org/changesets/93633223

(übersetze das) Please add source 'local knowledge' if you know personally that the building level is 1. Satellite imagery alone isn't enough.
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Published using OSMCha: https://osmcha.org/changesets/93561085

Are you going to add the inner lines for this multipolygon residential area?
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Published using OSMCha: https://osmcha.org/changesets/93560465

Why was the ref 48 added to the Waterfall Glen Main Trail Relation?
osm.org/relation/3484859#map=14/41.7094/-87.9784&layers=C
What is its significance? I would like to delete it.

Also, not to be nitpicky, but could you add dedicated crossings (marked/unmarked) for the sidewalks that cross the street? I know it takes a bit more time, but it's technically more accurate mapping.

The amount of houses you've added is insane. Keep it up! I tried looking for building footprints on the City of Batavia and Kane County websites but there aren't any. That way I know you're not wasting your time :)

Fixed

The boundary originally shared nodes with the Modaff Road Way next to Springbrook Prairie. I had disconnect it temporarily from the road in order to edit some of the road's tags since I could not select the road without selecting the overlaying boundary in iD. I edited the tags and then returned the boundary back to its original position, however, I may have split it or deleted it in the process of doing so. I cannot find the other part of the boundary that should be along Modaff Road anymore. I cannot fix it.