On Lectionary: Selections from within the 512 clusters vary widely in their connectedness to the historical Jesus and risk generating as mythical basis for church as we have now.
If our goal is to reach alumni, then sticking to the core teaching and being free to inform that teaching from the larger body of related material, as well as from other faiths becomes the hinge of flexibility, wonder, and growth. What is brought to the core teachings should not be specified, but given wide choice. There would be no difficulty in including a reading from Jesus' heritige that clearly related to his expression, or any heritage. Are we not inclusive?
What we offer in a lectionary can be informed by history unlike the existing church, and the clebrant can elaborate from there as a separate issue (perhaps a subscription or wiki basket). -- HGB