I haven't done a list like this for at least a week or two so... some more ideas. (I know some have been discussed already, like transferring room control)

1. Option to remember password when logging on.
2. Host should be marked so players know who room host is.
3. Hosts leaving should automatically pass on room control to the other players in the order that they joined the room.
4. Host should be able to remove any teams (before game start).
5. Button to randomize starting positions, option to do this automatically
6. Option to automatically shuffle team playing order
7. Teams added should have the same number of hogs as last entered team by default.
8. Button to start game should be grayed out until all players are ready.
9. Display game settings (map, scheme etc) in load screen.
10. Refresh room list automatically on leaving a room.
11. Customizable weapon delays
12. More helpful log naming. Perhaps include room host, map name, game scheme, and whether the player was present in the game (or just an observer).
13. Team health display should update when first joining a game.
14. Names should be displayed in reverse order when game starts (team with first turn should start at the top).
15. Should automatically save in-game hog name/health display preferences, or there should be an option in the global game settings like there is with volume
16. H should home in on whatever the camera would focus on if the mouse hadn't been moved. Plane and napalm shouldn't lock the camera. Camera should stay focused on a hog for long enough after a weapon has been used to allow it to retreat successfully.
17. Invulnerable hogs on rope shouldn't do 'hurrah' taunt when attacked.
18. Middle mouse button could reset camera zoom.
19. It should be possible to precisely aim deagle/shotgun shots after the first without having to release the shift key.
20. Reclassify rope and parachute as utilities. Define utilities as weapons that don't end turn.
21. Players dropping out shouldn't trigger "stupid" voice taunt.
22. Timer should stop the instant the hog with the turn starts drowning.
23. Skip go shouldn't have a crosshair.
24. Hogs dropping items from rope shouldn't lose crosshair.
25. Shouldn't have to press return after esc to clear a message.
26. Should be possible to move with UFO selected, even when a target hasn't been selected.
27. Defeated teams could drop off the roster (like in worms).