3 additional options:
1. Message system, like the current one. You could even make it so that there was just a "your base is under attack" message when anything but om was attacked. Additionally, I think it would be good to have a spawn specific message, like "Egg 1 is dying, n eggs left". It is annoying when games end simply because nobody realized that the last egg was getting killed.
2. Radar indication - kind of like damage indicators in HL or whatever. A red arrow on the radar in the direction of hurting buildings. Maybe this could even be implemented in the case of teammates that are being damaged, so that players could know when to send reinforcements and whatnot.
3. Icon system - I think it is a little bit too much to have all icons always shown on HUD, except maybe for builder class. However, maybe there could just be an icon for each building type, and when one was being attacked, make it flash. Adding health readings for 10 sec during and after attack would be useful. If this is too complicated, just have one "danger" icon or whatever that flashes whenever a building takes a hit.
One way or the other, any of those things would really help with teamwork, and would really help with the strategery part of Trem. Many of these things would require pretty insignificant changes, but I think they would make a huge difference in gameplay, for the better. :wink:
I am not a big fan of the camera. Seems complicated and confusing, especially for new players. Also, I would rather have a HUD indicator than a little screen to check any day. Much more intuitive, and easy to read on-the-fly. So, the camera might be cool, but I don't think it would be a replacement for any of these.