My take on the "Chourio not making the catch" thing is this: (please note that I have no actual knowledge of whether or not this is true. It is merely conjecture.) I kind of feel he has been playing carefully out in the outfield so as not to risk an injury in a meaningless spring training game. Perhaps, he's even been "coached" a bit (maybe by a teammate or member of the coaching staff?) to not risk a serious injury in spring training.
I can understand how the kid probably feels. He has immense pressure on his just-turned twenty-year old body to be the team's present and long-term future superstar. If he dives in a meaningless spring training game and separates his shoulder, for instance, wowzers that would be slightly devastating in the short term and could be something that bothers him his entire career.
Once Opening Day hits, I would expect that, assuming he makes the Opening Day roster, that he will flip the switch and play balls-to-the-wall in most situations. An injury similar to what I described above would still be devastating but I would be quite forgiving because it happened in the regular season when the games actually matter. Injuries happen--it's a fact of life. If a player, who is now financially set for life, feels that he should not risk the huge investment by the Milwaukee Brewers Baseball Club in a meaningless spring training game, I don't blame him one bit.
Of course, if he was battling for a roster spot and was just some ordinary minor league player with a decent (or worse) prospect rating, yeah, then I could see it as a slight problem that he's not out on the field making plays and trying to improve his chances of making the big club. But he's not. He's the #2 prospect in all of baseball. And that merits, in my mind, a bit of caution to make sure he can actually play in meaningful baseball games.
Okay, there's my thoughts. Again, it's just an opinion. You may disagree or feel otherwise, and that is totally fine.