Academy SBB?

[Moonglow]

This is more just a question based on curiosity more than anything.  I'd read somewhere people wondering about what Arena spells will work in Academy balance/power wise. 

I was anticipating from this there will be an Academy mode/filter in the SBB that will narrow the spell selection across sets down to Academy suitable spells?

This will be pretty interesting to see, or is it as simple as cutting back to level 1/2 and novice spells?

[Sailor Vulcan]

Arena spells are not backwards compatible with academy. Academy spells are forwards compatible with arena, though.

[Moonglow]

oh, I hadn't realised that it was that sweeping an exclusion - is all cards an exclusion?

Is that just down to the difficulties working out balance?  I mean the cards are all same format and everything, its just power level really isnt it?  Or is there something more fundamentally different?