An alternative idea:

Do the Blend between two edges




select yellow edges,copy them and paste using same snap point (end-middle)



Extract isocurve from blended surface,snapping in the middle



delete blended surface,select three curves and two edges and do Network



repeat same operation with second set of edges :Blend surface-extract middle isocurve ,copy last yellow curve from Blend and copy first curve from Network.
Now do the second Network surface



Now join one by one all four surfaces ,then join with the rest and you'll obtain a solid



If you want to simulate better the Blend behavior you need to extract more curves:turn on points of blended surface




Extract isocurves snapping on the points



M