I can understand not liking too many battles...in all films.
For example, in Star Wars it's good to have the attack on the Death Star as it gives the hero something big to do...but it's not necessary in The Empire Strikes Back as we can follow the characters more without long bouts of time where people aren't talking and only fighting.
The implication in this post is that, somehow, there was "something big to do" in
Star Wars but not "something big to do" in
Empire. My reply was to point out that
Empire does in fact features battles, that range in scale from planetary invasion to shootouts to personal duels, all of which feature our heroes and, generally, are significant to character development. Specific to what happens at the end of a film, the "battles" at the end of
Empire are rather extended. So using that film as an example of one that doesn't need or require "battles" (or conflicts, or action, or however you want to distinguish them) doesn't quite make sense. If I've misread your post, then it needs some clarification regarding the point you're trying to make.
Either way, my point is I've found the "battles" in HP 5 & 6 severely lacking (or curiously nonexistent), and the Yates quote provides a fascinating insight why. I'm intrigued that Yates (and Kloves) would take part in making movies that feature battles -- when they admit they don't like battles. It's like someone who dislikes sci-fi making a sci-fi film. Not that it can't be done (and done well), but in this respect I've been underwhelmed by Yates (even though I loved the visual style he used in HP6).