Honestly, I think both the Soldier and Demo's weapons are over-powered. As stated above about Demoman I can agree with. Moving onto Soldier, the rocket launcher he has shoots faster rockets and due to the fast speed and can easily hit a single enemy even though it's blast is not huge. The buff-banner gives everyone around you mini-crits and if it consists of two Heavies you'd be easily forgeted. The Equalizer gives you more damage as you have low-health, and it's funny to watch people instantly switch to a fully loaded rocket-launcher or shotgun just to use the Equalizer and hope they can get a single kill.