The animations are just a representation of the statistics. They're trying to give you an idea of who is having possession, chances and when goals are scored and by who. I don't think you can see anything more than that in them.

There are a set number of animations (or paths for players to take in the animations) so you're going to see the same thing over and over if you play enough. They'll never get round this as it's not a true simulation, but I agree that they could add in more variety and link the animations to your tactics better.