Since the one over at steam community was overrun, and the fallout hasn't quite faded, my fellow hat-loving compatriots are welcome to talk about TF2 here until steam is irradiated. Unless some jerk gets the entire population of whiners to migrate, we should be safe.
...At least, I don't THINK anybody would expect a new bunker here.
New weapon mechanics would be nice but as for the map you can probably find a private server that uses it.
I'm a bit disappointed but I've come to expect hats from every possible event in TF2.
Just like in any game cosmetics are easy to add but new mechanics (maps, weapons, classes) require testing, balancing, and approval.