1. In a fast paced game like TF2, respawn times do a lot more to hinder the gameplay rather than help it. Look no further than TFC. The game would be unplayable with respawn times(I swear to god, the first person who says I want TFC with new paint gets punched in the face).
2. I realize Valve's intentions were good on this but I just don't like it. Again the speed of the game comes into play. The only time you have to talk is when you are dead, otherwise you are constantly on the move(or at least should be). I really don't think the 15 seconds or whatever you have to check around an entire map for something(BTW, opposing spies should still be disguised when dead i they aren't already) is going to play a major role in a game. And either way, you can still tell them when you come back alive.
3. Then don't cal it sudden death or take the time limit off. I'm pretty sure there is no objectives during SD other than kill the entire opposing team. Something like this shouldn't be timed, and it's a good idea if they just let it play out.
FF probably won't be enabled. It'll eventually be a server option but I guarantee next to none actually use it.