I hope it's going to be something new and interesting instead of "slower weapon that deals more damage" or "slower weapon that poisons the enemy" or something ;D
All they really need since they're greatest problem is the class not being novice friendly, is a Silenced Revolver that can be fired while cloaked (removes disguise, but not cloak), but does maybe 20% less damage, for people who fail at using the cloak, and the Team Fortress Classic Knife, which automatically
instantly puts you in the disguise & name of whoever you backstab with it, but maybe cause you to lose 5 seconds of Cloak or something. This makes people who suck at disguising have something to help them out.
Also they need the following fixes:
-Long backstab animation needs to go, or be changed to hit damage -> animation, instead of vice versa.
-Cabinets need to restore Cloak. Every other class gets 100% filled by them, why not Spy.
-Medic disguise needs a random ubercharge %, so it isn't bloody useless.
Otherwise they are peachy. I'd like to see a TFC Sapper (doesn't disable & destroy, but rather takes control of after 3 seconds (doesn't disable at all.), but only requires 1 hit to be removed (to add a con)) but the sapper or disguise case isn't in their inventory, so.
Spy is pretty much the most balanced class in the game. Tons of weaknesses but none that are overpowering completely, and can all be removed by skillful play of the player, has a good learning curve to where novices can do okay, but pros can do very very good, and their entire mechanic revolves around skill on the other team as well. The worse the enemy team is, the better the spy is (this holds true for all classes, but it's far more apparent with the Spy). They work really well.