I wish there could be, but I don't see how they would implement it. Especially with the possibility of some technical problem with the video or communicating with the third party reviewer.
As a step in the right direction, though, there should be a cost to the coach to throw the brick. Now, when you have one brick and only one wrestler in the session you might as well throw it, since the worst that happens is that you can't throw it a second time. I'd like see them get the brick back if the challenge is successful, but lose a team point if it is unsuccessful, similar to football coaches losing a timeout for unsuccessful challenges.