If it turns out that there is a place for the PostgreSQL team, would it be best to interact directly with the hackers mail list or was my use of the web form ok?
I would personally use the pgsql-general list as that has the widest readership and is also the most appropriate location. The hackers of PostgreSQL watch that list so you'll have their attention. They would move it over to -hackers if indeed they need to modify the source code for some reason.