Given that the event occurred 1.3 billion LY away, and required the most sensitive detection device ever made, I am going to have to say these are not likely to be seen in ED. These kinds of collisions are the result of larger scales collisions between galaxies, and the resulting interaction of their central black holes, so this is going to be a pretty rare event in the lifetime of the galaxy. Certainly not nearly as common as in the early universe. The Earth might be toast before such an event occurs again in the Milky way. Say between Sgr A* and the Great Annihilator.
There are other events that ED could utilize though. Like supernovae, gamma ray bursts, planetary collisions, asteroid and comet impacts, binary stars cannibalizing each other via tidal gravitation.