Read their blog, dudes. They carefuly considered the gameplay implications of each item right down to the fucking artwork before they released them. The Sandman is in there so the scout can stand up against heavier classes he normally wouldn't stand a chance against, the Force-a-nature is there to increase mobility and make hit-and-run tactics more useful, and the Bonk is for sneaking past sentries which make the Scout otherwise unplayable. It's a great update, and the origional threee weapons are all still popular and useful, so stop bitching.