The mazes add a lot more strategy for defending/walling. I agree with not being able to bring your own gear as well. Come in naked, set up a regs/supplies stone so everyone is on the same level. Taking away pots also encourages teamwork.
I've played a couple CTFs in the last couple days and have been disappointed. I think there should be mazes added to all 4 bases, so that you can properly wall people out. As of now getting the flag takes 0 skill, you can spam teleport faster than people can run/cast.