As I level higher, I notice that the massive event battles have less and less chaos. I would imagine that is because the people have learned how to better play their class. I know I have. Also, you have more toys to play with as you level, which increases the diversity in approaches.
That is the other thing..I notice far more people actually switching weapons mid-fight as I level up. Again, a sign that people are starting to learn their class. From 10-15 I don't see a lot of that, from 20 on up I see a lot of it, particularly within the rangers and guardians.
To me, we are all a bunch of Swiss Army knives. The trick to the game is to use the right tool for the job. I think that is really part of the fun, and I am really glad I didn't spend a bunch of time in beta or watching gameplay videos because discovering that stuff is really making the leveling process a lot of fun.