Dunno, I could see some merit to that... dwarfs treat the wheelbarrow as part of the stockpile?
It's micro, but not horrid micro, esp for mining...
I don't think it could.work for a repeat...
More like... build it in the shaft, say 'fill' as a stockpile, then when you are done, say 'dump here' which sgould be close to where you want it... i.e. your dump, or where you plan to build a stockpile.... makes a good addition to other options.
New stockpile setting: max distance stockpile will pull an item from.
No micro unless you set it up for a one time haul.
You build the wheelbarrow up next to a craft shop, and increase the room size to include the craft shop.
Set the destination for the craft stockpile next to the depot.
Dwarves fill the wheelbarrow up with crafts till it is full, and then dump it at the destination. If it is set to repeat they then take it back to where it was before.
It basically acts as a one tile stockpile, but when it gets full it is emptied at another place.
The thing is, the "makes a mobile stockpile" role is basically the exact purpose of a minecart - wheelbarrows are meant to be just for normal hauling. If you want to set up minecarts manually, that's one thing, but wheelbarrows should be different from minecarts if we are going to have both of them, especially if we already have to set down tracks for minecarts to follow.
I'd also say that it's better to just talk about how to give dwarves the AI capacity to realize when they need the minecart returned. You can just set the little stations for the minecarts on the tracks, and let dwarves decide when they need a cart in that station.
If you want to have a dedicated cargo route, you can set a minecart track from the furnaces to a central storage area or for raw materials to be shipped from the mines to the furnaces.
If you can do all this with wheelbarrows, what is the purpose of having a minecart at all, when minecarts involve tracks, and possibly even draft animals, which are a much greater material and logistical upfront capital cost, when you already put all the practical advantages of minecarts on wheelbarrows? Even if you say that minecarts can carry more, it's not likely to be so much more that you can't just put in a fleet of wheelbarrows to compensate for the lack of hauling capacity.
Also, the objective should always be to reduce micromanagement of functions wherever it is even remotely possible.