Some of my ideas/tips.
I think key bindings are useful...although I haven't implemented them yet.
BTW, Are there default keybindings for CTF? If not, then there should be.
I like the location-based messages in theory, but in reality I've found that they are too complicated to read during the game. I think useful keybound messages need to be short and sweet.
"incoming enemy"
"attacking enemy base"
"I'm guarding base"
"affirmative"
"Stop f&*cking telefragging me, you dumb bastards ! ! !"
(that last one was a joke
DEFENDING...
When on defense, don't just stand there. If there is something to grab...GRAB IT. If not, then the enemy will grab it when they rush in. I've seen way too many times that people will be defending the base and standing there next to some health or armor shards. If there is health, GRAB IT..ALWAYS. When I'm the only person on defense in facing worlds, I'm constantly moving around picking up every item I see...including both NEXs, the grenade launcher, the rocket launcher, the armor shards, etc. After doing this, I found that the enemy attacks were not as powerful because they would show up thinking that they could grab one of our weapons as they are entering the base. Intrepid used to do this a lot and he was pretty successful at killing the enemy with their own weapons or even strength rune.
Be smart about this...if you have teammates guarding the base with you, let them get some weapons, ammo, health and armor also. However, if they are just standing there (like most do) then nevermind them.
Also, when defending, and you see one lone enemy entering the base by themselves, you may want to hide a bit so they don't attack you. They will go directly to the flag. This allows you the advantage of prediction. If you know where your opponent is heading, you can (almost) always hit them. Use a rocket or grenade launcher. I see a lot of people firing directly at the enemy. You need to think about where they are going to be.
As with the above...pick up on patterns of movement of the enemy. Many of the best capture artists

have a pattern that they follow. If you pick up on their patterns, you can predict where they are going. For example, in facing worlds, I found that a few players like to grab the flag and immediately grapple toward the strength rune. 9 times out of 10, I know where to aim if I don't kill him at the flag location.
In facing worlds.... if someone is successfully attacking you with rockets or grenades from outside the base (through the front door)... go through a teleporter, jump over them and attack them from behind.
DO NOT ALLOW THE ENEMY TO TAKE OVER YOUR BASE. Even if your flag is not there. If they maintain your base, they will not only grab the flag at will, but they will also do a lot of spawn killing, as well as take all of your weapons and ammo.
OFFENSE...
If you are having difficulty attacking a base, like if they have 3-4 good defenders killing everyone that enters, I suggest doing something to pull their team apart. If they are together, they are powerful because of crossfire. If you can trick one or two of them to follow you out of the base, then they weakened enough for one of your teammates to enter the base and possibly get their flag or at least kill one of them.
Attack in groups. The most successful captures come from attacking in a group. It really sucks for a defender when they are attacking one or two guys while their buddy is grabbing the flag. The defender usually tries to stop the flag carrier and ends up getting shot from behind.
That's all I can think of for now.
