The difference with the current way and the option I suggested to "fill wheelbarrow" would be that you can put it as default action and that instead of having to open the wheelbarrow and transferring the soil from your backpack to the cart by CTRL-clicking it, you can put it as default action on the wheelbarrow and just click it without having to switch to cursor mode. Simply click ground, turn to wheelbarrow, click wheelbarrow, turn to ground, click ground, click wheelbarrow, etc etc
Now you simply keep clicking ground until your backpack is full, then open the cart, CTRL-click all stacks to the cart and turn back to digging.
Not much of a difference indeed yet this change would be handy in case the other part of my suggestion about not having the dug up soil go into your general backpack yet onto your shovel, would be implemented as well. As in general one would not purposefully put soil in a backpack.
This idea is a small part of a larger idea I had. Instead of having 1 big backpack, a character would have several portable container he/she can equip.
For instance one could equip a travellers backpack to stash normal items in, a pouch to hang on your belt to store herbs, sling ammo, gems, etc (aka small items) in, or equip a bucket carrying rack (
http://s3-eu-west-1.amazonaws.com/looka ... 107603.jpg) to carry buckets of water/soil/ore/..., etc etc
A bit the same principle we already have with containers and why some items can't go in a barrel, others not in a crate,.. simply because they would not fit.
and it would help organise the things you are carrying around a bit instead of tossing them all into a big backpack and hope you still find that one nail you put in there weeks ago....
Not only would that increase realism without really much of a hassle gameplaywise - you'll just have to make a primitive bucket before you can transport soil - it would also add some new items to the game which you need to craft. Useful things to craft which wil increase your skills instead of having to grind-craft the same freaking crate you don't need just to get a few skillpoints up.
Which is something we really need: useful items to craft to gain skill level instead of repetitious grind-crafting 35M nails to get that forging skill up another 10 points...