Salam
It is definitely a good idea to have a section for hadeeth and tafseer on the forum. As for not having trustworthy scholars on the forum, that is not such a problem. Brothers and Sisters can submit articles of hadeeth/tafseer that they may have found online and we can have a discussion about them.  You do not need to be a scholar to discuss hadeeth/tafseer as long as you do not begin to differ what is in the text.  Only scholars can have ikhtilaaf (differences of opinion)
Wassalam