I personally think that most buttons etc are way too big in AC generally.
Making it look more childish is a way - ok that might be a bit harsh. I like the size of the co-ordinates box and the number, and think that every pallette and dialogue box should be similar in size to this. But I can see where you're coming from. Now that AC9 is out and the new managment or pallettes etc is include, maybe there should be two sizes. Though I guess as the old saying goes cant please everyone all of the time.
Though again, some consistancy with sizing would be great. And keep it condenced I say.
Don't forget the analog approach - a nice magnifying glass hung on a gooseneck over the top edge of the display can impart a cool "Brazil" movie theme to your workplace.
What was Sam Lowry's Ministry, anyway?
I tried this recently. Went to the "dollar store" and bought a magnifying glass. They should call it the $1.25 store because everything in this place costs more than a buck. That magnifier would have made a fine stage prop but sure was a lousy optic. What was I expecting?