I still don't see why it has to be the Artificial Heaven. There are a ton of things it could be otherwise... That would be convenient... but it still isn't clear yet... I think these conclusions should be made with a grain of salt...
Either way... whatever is powering up Mikoto, I am curious whether Gensei saying that this is the "start" of another level 6 shift project makes me wonder whether this will end this arc or will continue into future arcs... Because if it is just the start and not the main part of the project that he had been preparing for so long... then it makes me believe that even if things are resolved now, Mikoto's troubles with regard to level 6 probably won't end now. At least that seems true
This either means this arc is still short compared to its final version or that this issue will be more pronounced in future arcs... I wish both happened
I wouldn't mind for like a 48 episode season III
half story, half filler.