Hi, and welcome to OpenStreetMap! Since you requested a review, I looked over your changes here. Looks great! The only suggestion I have is to add a direction to stop signs. (When going along a road way, a driver will only have to stop when they pass the sign in one direction, right?) A three- or four-way stop can be represented by a single node at the intersection, but it's best to be explicit by adding direction=both if that's the case. Speaking of which, do you happen to know if the intersection of Leto Drive and Thetis Drive is a 3-way stop, or would they only stop when coming from Leto?

Anyway, thanks for your contributions, and let me know if you have any q's! I'll fix the stop sign stuff where possible.