Well, it's not that the explosion could really be controlled. I mean, I sure as hell don't want to re-open a can of worm, but it is rather evident that the explosion destroys every ship of the fleet. I mean, as I said there doesn't seem to be much of a distance between the manned ones and the AI ones (hell, I didn't even know that there WERE AI controlled ships until an hour ago or so). It is reasonable to think that the explosion would have destroyed everything, no matter what. Even if Superman had been the one who would have exploded.
And while re-reading the story.... Luthor says (I quote): it should be enough force to take out the whole fleet . There's no distinction at all between AI ships and manned ones.
I have a serious doubt that Snyder's comment could be an afterthought, I'd really like someone to pose the following question: "Does the explosion destroy every ship of the fleet, including the manned ones?" on Twitter. Or, even more clearly: "Was Superman ready to kill a whole armada of evil aliens?".
Anyway, if nobody will do it, no matter, I'll simply forget the whole series and that's it.