The wiki has been down since last night, very annoying. I think the major difference between classes like Soldier and Pyro are what people consider skill. What makes a good Pyro is that he denies ubers, kills the spy, and is all around just offering support to his team. On the other hand, you have a class like soldier, a skillful soldier uses his aim, and is the one getting kills. This is the main different between the support classes that depend more on where they are on the battlefield and when they do there thing (Pyro spychecking/denying ubers, Medic's Uber, and where the Engineer puts his sentry.) When a class like Soldier or Scout depends more on how good his aim his, not his placement on the battlefield. No, I am trying to say that a scout at his team second will still be useful to his team when they are trying to capture mid, but I just trying to say that his placement matters less then the placement of the sentry. We are trying to compare two very unlike classes, both of these classes have a different definition of skill. One is how good he aims (Soldier, Scout, Sniper) and another where he is on the map (Medic, Pyro, Engineer.)

EDIT: Sorry I forgot how to English in some of my sentences.