1: It doesn't seem that bad in principle to me. I agree that it's far too drastic, and if you try taking a quick look behind you, good luck figuring out which way is up for the next half minute.

It might be ok if it's either 3 to 8 times weaker, or responds non linearly. (i.e. turning faster doesn't make the camera wobble more after a point)

4: If server options are ever supported, a force auto balance would help a lot. If options would take a while, just make this the default behavior until then?

1. Wobbly camera needs to go. It's very easy to get dizzy or disoriented because of it, and it's especially bad in tunnels/trenches. It's like the block people are extremely drunk.
2. A donate button is needed somewhere, since this is a free game and is really good and is clearly growing in popularity quickly, you need money to keep it going, so having a donation button would be ideal, especially since the main server is always crashing.
3. Jumping shouldn't be as clunky; Since this is such a blocky landscape with blocky hills and such, you'll have to jump often, but it can be alot more tedious than it needs to be to do so.
4. There's a problem of other player jumping teams. For instance, a green team player jumping to the blue team just to destroy a fortification and he can't be stopped. This could be solved easily by having it where once you choose a team, you can't change it during that match. Other lesser solutions could be the ability to votekick or friendly fire.