I don't see how trick jumps have any relation to teamwork. They are very individual skill oriented. They can be practiced individually and executed individually. You don't need any kind of team to do them. Requiring trick jumps to get to a flag seems very unprofessional, really. Have you ever seen CAL have maps that require the use of physics exploits in the game to obtain more points? What about a BF2 map that has a capture point that all but the most skilled players have difficulty accessing?
All I see this doing is increasing the gap between skill levels, and making the map potentially less fun for everyone. I have a hard time believing your comment about castle1. With as much as you've practiced it, that back door jump is probably just as easy as running up a ramp, so it's not like it adds much of a challenge to you in that respect. All it does is restrict the number of opponents that can use that path, making it easier for you to beat them. Also not challenging, and unless you like easy wins, not as fun. Even with castle1, though, the trick jump isn't required to get the second flag.