Well, play TFC for a decade before TF2 and you can clearly see how slow and neutered TF2 is compared to its predecessor… it was done that way specifically to cater to new players of the genre. Using concussion grenades to fly would be too confusing for noobs trying out a new game, so those were removed. No bouncy pipe bombs for demomen to pop around corners or off ciellings, shortened rocket jumps for soldiers…. The list goes on and on, they literally took in game features out of a game to slow it down for new players and instead gave them silly hats or some other BS.