Is Melchizedek a proto type for Jesus? These are the sort of questions I'd like to discuss in a small group, ideally four, in a conversationally church sponsored setting. Also, the problem of cliques in churches should be constantly attended to, especially in Protestant ones.
There are also more than one hard parables and other difficult topics ignored. Unfortunately in many churches most are usually, as I think Paul says, forever learning and never coming closer to the truth.