What I was originally planning on posting before Aqua did this:
The server now has Spectator Deathmatch. Fortunately it has recently become free to use!
When you're dead, type !dm in chat to join a free-for-all like game to pass the time until the end of the round. While in this mode you can press f1 to choose your weapon load-out.
A side-effect of this addon is that you must now use the 'u' key (or whatever key is equivalent to your official team chat) to speak when dead instead of being able to just use usual chat and it working automatically. So if you find yourself unable to type when you're dead, don't panic, just use your team chat key instead.
Have fun!