I personally don't have a strong opinion either way on including the connector routes, and won't shout you down if you want to activate usaky3.
Do you have any knowledge as to whether similar routes were included/excluded from Kentucky Highways 1-999?
You're probably aware, but I just wanna make sure, that on activation, all the usaky3 files would be moved into the usaky directory, and the contents of the usaky3 CSVs would be merged into the usaky CSVs.