This should be the top reply. CoMaps is actually very good at interpreting addresses, but if the data isn't there it isn't there.
Some editors are beginning to label address blocks so that users can at least locate the correct street block instead of just the street. It's a lot of volunteer hours to do it.
If users want to improve it, CoMaps makes it extremely easy to add points or leave a note for editors. That's about the best you can ask for.