I think that a better draft platform will incentive posters to elaborate their posts and topics more carefully.
You may have a point here, but I think 7 days span is enough time for one to make changes, elaborate and proofread thier topics or posts, for me the draft system works pretty fine as any post that probably can't be edited and made ready within 7 days should then be saved elsewhere,(outside the forum) then whenever ready can be posted on the forum.