I have an idea bc i was a sgt. before i knew a lot of this.
1.) create a map where you can fight against bots (or training area would work) you start as a gunner and it tells you the basics. As you kill a bot, you can play as that class on that map. this would make it to where you can find out the specifics of each class. (e.g. when the tech fully charges his repair beam, he can press "r" to give the status hyperactive, or left shift to slide, or the tank has a shield when you right click when you are using the blitzkrieg mauler. etc.)
2.) or give another tab on the armory that says all of the specifics of each class.
they should make it so that you can sell your ep after you have <500 ep bc you cant buy any more cards. OR they should make it so that the eps carry over to the next event
Zombocalyptic extravaganza badge: use the pistol until there is a big group at your front door then blast them then immediately switch back to pistol. repeat. if you do this, you wont have to use the shotgun more then ten time, so you will not have to reload it