But see the only reason WDW set it all up differently is that they have to. At DLR, there are obviously less guests than there are at WDW. On top of that, most of the guests are locals, and so there is a smaller percentage (of the already smaller crowd) of people that want to meet the characters. For the most part, when a character walks around at DLR, he is not absolutely mobbed. Yes, there might be a bit of a crowd, but the characters are trained on how to deal with that. At WDW, it's a completely different story. If a character were to simply roam, they'd be mobbed, tackled, abused, violated, picked up, carried around, pushed, shoved.....you get the picture.
So basically the only reason WDW set things up differently was simply out of necessity, not necessarily because it provides a better character experience. Because it doesn't.