Hello! 

Thanks for the contribution. You can make the building crisp by squaring the corners (click the building, press 'q').

One oddity of OSM is that we store all names in unabbreviated form. In this case the street names should be expanded to their full text. It's a bit odd but keep things nice and clear.

I've done both of those edits just now so you can see what that looks like.

Happy mapping, definitely let me know if you have any questions!