The more I think about, the more I say... Sakura falling in love with Naruto would have gave her character more development because he made her feel stronger while Sasuke makes her weak.
Which all falls under the symbolical theme of a flower under the effects of light vs dark, like I've written in my latest NaruSaku symbolism post.
Kishi was developing these two in more ways than one. But he was subtle about it. That's the problem.
Because the geberation nowadays just looks for handed on a silver platter, fast action.
They don't have the time to see something developing slowly.