It has already been stated that the Shadow Clone technique was designed for reconnaissance missions, just like every other clone technique.
This reminds me of something. Presumably, the Shadow clone technique is a shadow element technique. And if Minato and Naruto were, hypothetically, to have a kekkei genkai, what would it be? "Shadow Wind" Almost sounds space-time related.
What if Naruto could learn to make Wind Clones, made of Wind Rasengan-type chakra? Suddenly, his clones would be extremely dangerous. Just touching them melts your skin off. Or what if he could make Rasengan armor to protect him like the Kyuubi shroud does now? What would a Shadow Element Rasengan be?
I mean, the Rasengan is obviously Naruto's most important move. It might as well get put to good use in creative ways.