I'd be interested.
To me there is an underlying layer to every class that is relatively hidden to those who complain about pyros and say it is "one of the easiest classes to play."
I think that each class has an incredibly difficulty curve after you've played the class a bit but the usual tactics just aren't working like they used to. I think that the pyro is a great class and has more to it than just the usual "w+m1" generalization. If the pyro is used by someone who knows the pyro's strength's and weaknesses than he/she can destroy 6 players in 5 seconds.
I think that the pyro and the medic are unfairly put as the "easiest classes" because there is much more to playing medic than just pointing and shooting. I mean you have lots of things to think about, you are hunted by: spies, pyros, scouts, and when you're healing someone, you're more likely to be the target than the person you're healing. So you have to think on your feet and know when the danger is too great and you have to get out. So, like the medic, the pyro has an underlying layer of awesomeness that comes out from only the best players.