Any thought about adding logistic versions of the depots? Something that will allow direct interaction of logistic robots with the stored inventory. Another way to describe it would be to have the transport network supply depot act as a logistics network requester and transport requester act as a logistics supply so Robots can deal with the local area without needing to first transfer from the transport depots to or from logistics chests.
(The thread title came from an early thought about having the roboports built into the depot, but the more I thought about it, the more I thought they should be separate and I forgot to change the title.)