You changed the address of a building located in Denver, Iowa. Iowa is not Colorado. You should changed the state back to IA.

It looks like all of the "offices" you added were pretty inaccurate in shape and label. Are you actually getting this information from LiDAR scans?

Since you are using the iD editor, if you right click an object there is an option to square. You can also select the object and press Q which will also square the object.

It seems to me like all of those buildings should be either labelled as "Building" or as "House".

I'm curious where you pulled the names for some of these neighborhoods? Specifically Fejervary Neighbors.

Thanks for the feedback. You can revert the changeset if you want.

My understanding is that it is preferable to tag sidewalks adjacent to a street with sidewalk=both, sidewalk=left, or sidewalk=right. In cases where the sidewalk goes away from the street, map it as a separate way.

I didn't actually add the tags to all of the streets where I removed sidewalks so my edit isn't very productive.