I remember Back when Death-run Hell 1 started, engineers would build teleporter exits outside of certain traps (specifically traps that would pull you in a room and kill you slowly) and go into them to build an entrance so the people could get out. If it's not obvious yet, I'm proposing you bring back teleporters so engineers could do exactly what I remember seeing. If you think the teleporters would take too long to build on most of the traps, rendering the special to be useless on the majority of maps, you could always buff the speed of a certain weapon or give the teleporter entrance/exit an instant build time like during setup time in MvM mode. Death-run Hell 1 is the most active server in the Saxton Hell community it has also been in the Saxton Hell community for a long time and nearly that whole time the engineer has never had a special, there are two Death-run servers now and the engineer still doesn't have a special it's about time he does so please consider adding teleporters back to the servers and maybe even buffing them a little for faster build time.