We've been pretty quiet lately, but thankfully, that's about to end. In the next few days we'll have an update out that has a couple of new features for the Engineer and Spy, and a variety of other smaller fixes.
* Teleporters will be upgradeable to level 3. As the teleporter is upgraded, the cooldown will decrease.
* Dispensers will be upgradeable to level 3. They will heal faster and generate metal faster as they are upgraded.
* Spies will be able to recharge their cloaking ability by picking up ammo off of the ground.
* We've made a bunch of minor changes by adding particle systems and upgrading the HUD to show things like deaths by critical hits, players that are overhealed, and giving more information to medics when people are calling for them.
These are just to work on some class balance and depth issues that we've seen in the wild with these two classes, but aren't meant to replace their entire class packs. They will be getting more attention further down the road.