at least 30m for Roo, or mata + something.

Cesc % low in signing, CR too.

nurture young kids.

I gotta agree. It's still too early to predict anything yet. And yeah, the first 5 games are tough games so it's natural that Moyes goes with players he is more familiar with and who are fitter. He's doesn't know a lot of these players aside from pre season, after all. We'll see as the season progresses and I think everyone will be rotated eventually, although the size of the squad rotated might be smaller.
Not to mention the fact that Rooney is naturally bigger, stronger, faster and fitter than Kagawa. The genes make a lot of difference.