Arclight has to be Elite 4 too, huh?
So we've got Laura, El, Benett, Heather, Anna and Arclight as candidates for E4. Assuming that Anna is the Champion (which I seriously doubt, but I don't see anyone else for the job...) and supposing that Laura has been kicked out... yeah, that makes it 4 people for the E4: El, Benett, Heather and Arclight. If Benett and El were to switch places, there would be an empty spot in the E4 by now, which would technically have no one to fill it.
And regarding to Ame's post about doing all the animations for ep.16... Yeah, the global development time of the game will be the same, but for the ones waiting here is much better to have more or less equally spaced episodes than having to wait like one year without any update... The choice is entirely yours, of course, but please consider this fact.