While I would love some new maps and stuff "Capture the flag" seems, no offence ment kind of....silly. Not a commentary on your idea or anything but the idea of klingons and Feds fighting to steal a flag and bring it back to base is just...yeah, we are in all out war and..you want to steal a flag? Not only that but you want to do it 3 to 10 times?!
I'm sure it could be something important, but i have a hard time visualizing something (Read one object) having to be stolen several times in battle (The same object at that).