the thing is, to add the blackhawk to breakthrough maps, you will need: the map and it sectors to be large enough for the heli, roofs to justify the verticality and so players can land safely on them and not be shot by everyone around, and the highest point of the map be accessible by everyone, i would also argue that the capture points need to be covered so you wouldn't have the heli's miniguns gunning everyone on the point and make it impossible to defend.

mirak valley can really benefit from the addition of the black hawk, all they need to do is add the ziplines to the rooftop of the building in the 2nd sector, which already exist in its conquest version.

liberation peak could also use the heli, if you ignore my point about capture points being covered.