The problem is the setup phase hasn't been a phase for timing issues, but that's slowly been changing. Adaptability, Lt. Dormitz, Hyperwave Comm Scanner, etc...
So if both players bring minefield mapper, who places first? You'd think it would be done in initiative order, but the setup phase isn't an active ship's turn, and there are no rules about it.
With the introduction of Minefield Mapper, at the very least, it's time for FFG to make a more robust setup phase sequence, especially if they intend to do any more abilities that do unusual things in the setup phase.


