I don't think I've mentioned it in this thread, but one of my signage pet peeves is exit only panels. In particular, I don't like how the border is drawn around only part of the panel when it's at the bottom of the overall sign. This causes the additional problem of having the black edge of the panel border directly on the edge of the overall sign, when there should be some yellow on the outside edge as is typical of warning signage.
Example from forum user kniwt (US 395 NB in Reno, NV):
In my opinion, the exit only panel should be set in slightly from the edge of the sign. The panel should either be fully bordered or have no border at all (I like the look without a border).
Example from AARoads (I-80 EB in Reno, NV):