Great tool!!! This covers two requests.
1) One edge that can connect to multiple nodes, e.g. "A" is the source node, "B", "C" and "D" are the destination nodes and viceversa "B" "C" and "D" are the from nodes and "A" is the to node. All edges have a common label. I think some of this can be done through the "edge grouping" but it is a very obscure functionality.
2) Provide joins/split that permit combining or spliting edges