The eladrin teleport is not "teleport with a 5 minute recharge", it is "teleport then you can't teleport again until you take a short rest". A short rest is not "walking around trying to avoid the guards", it is "sitting quietly, not moving, not acting, and resting."
So big deal, the eladrin can teleport up to 25ft in line of sight. He can do it once and then has to quickly find a spot where he can rest for at least five minutes or else he can't do it again.
Basically... breaking out of a jail is one long encounter. The fey step power will potentially make one part of it easier, but it will hardly trivialize it in all but the most, well, trivial of circumstances.
So big deal, the eladrin can teleport up to 25ft in line of sight. He can do it once and then has to quickly find a spot where he can rest for at least five minutes or else he can't do it again.
Basically... breaking out of a jail is one long encounter. The fey step power will potentially make one part of it easier, but it will hardly trivialize it in all but the most, well, trivial of circumstances.