New patch, new weapons, new players.. it's the dawn of a new age for TF2.
I never saw so many new players at once, and I think it's good, because people leave the game all the time and if there is no new blood on the system, it end up dying.
I've seen some complains of the veterans about the new weapons (normal) the new players (expected) and about the game being ruined forever now it's free to play.
The last one is a big question for me. Personally I am curious to see how Valve will prevent someone to making a mock account, using aimbot or speedhacks inside the game and just making another one once VAC delayed response hit it.
For now, to all new players, enjoy the game and welcome to TF2.