I've been wondering for a while if they will add any more weapon classes. A grenade launcher would be cool as another heavy, though it would have to be 4-8 rounds and less damaging than a rocket per projectile - something like the Hawk MM-1 or Milkor MGL. A bonus would be the ability to choose different ammunition types - HEAT, HE, Sabot etc (whatever those would be called in Destiny) and potentially bounce certain types around corners. Would make a really cool area denial/assault weapon for PVP. Another idea I had for a heavy was something like the Barrett XM-109 - what is known as a 'payload rifle' - that is, a step up from an anti-matériel system, which launches a 25mm projectile at extreme range with the objective of defeating light armour. The Destiny version would be semi-automatic, but kick like a mule, so that the user would have to re-acquire their target down scope between rounds - it would offer a middle ground between a sniper rifle and a rocket launcher - high velocity, high range, heavy recoil, able to cause splash damage within a small range and around the same sort of direct damage as a grenade. Finally, what about a directed energy weapon similar to the fusion rifle, but instead of having a charge-up time, it would fire instantly (think Unreal Tournament Shock Rifle) and have a cool down after firing. The weapon would fire a concentrated beam over a few seconds, requiring the user to hold their aim on target to gain the full damage potential, and then some sort of heatsink and/or energy core would have to be quickly replaced in order to fire again - kind of like how machine guns have to have their barrels replaced after a few thousand rounds, but the energy released is so intense that this is required after each shot.