I never understood this - if the Alpha session needed a fully evolved Battlefield, and the beta's Battlefield had the Mobius Net, why didn't Jade take the net with it? The Battlefield she has now isn't the "fully evolved" one, right?
It’s fully evolved, the Mobius Net is needed to stop the Battlefield from being destroyed by the Reckoning. There will be no Reckoning in the Alpha session so the Net isn’t needed.
but could jade have known that already when she took beta!skaia before it got scratched away?
Probably not, but she could have not resized it and kept it with her if the Reckoning happened.