To be honest, it's not really helpful to add lots of OSM notes that say "roads are missing here" or "such-and-such should be mapped here", unless it's in an area that you are extremely local to and somewhere that you are planning to update yourself.  There are lots of places where I could add notes saying "this should be mapped better", but it'd just look like I was telling local mappers what to do.
By all means fill in missing roads in OSM, but there are lots of ways to find those without leaving notes everywhere - in this area I can see residential areas "with no roads" just to the north.
Best Regards,
Andy