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You learned kage bunshin to solve a problem; to your suprise, kage bunshin solves a lot of problems. Deciding on your course of action, you go out of town to a secluded spot and produced twenty clones. You commanded the clones to henge to change their appearances and then sent them on their merry ways, to scour for information regarding current situation, cognizant that it provides you surface information rather than in depth.

From what your perverted sensei taught you, kage bunshin was certainly a good way to collect information fast. Fast, but on surface only. To go in depth, you would have to cover the ground in person, to talk to other person face to face, to build connections.

For example, kage bunshin is very useful is useful to find out the overall problems in Wave, which faction is doing what. But to find out who is behind each faction would require a more connected approach, one that involves personal interaction.

There's only so many things clones can do without attracting suspicions to themselves.