Well that is sad. this group could greatly benefit from it. why have a suggestion board then?! replace it with something else if they are not going to be used once in awhile.
I suspect to keep people from messaging the site owner directly and flooding him with suggestions. Therefore it serves its purpose and thus no reason to remove it.
This site has been around for 20+ years and have pretty much established how they feel the site runs best, from that experience.
Also as a new user you are not quite aware of how this site runs. It would actually be no benefit to have such a forum. The BDF (Bible Discussion Forum) is a hot spot where the most biblically studied go to attack, criticize, argue and name call. And, obviously l, they don't stick only to the BDF.
So a section aimed at new users would only become another war zone as everyone would flock to it to influence new believers to their own view and undermine those with different views.