Level 45-49 EXd Incarnates should only have access to the Alpha Slot.
Level 50 Incarnates IN NON-INCARNATE CONTENT (such as PI Radios or ITF) get access to Alpha, Judgement, and Interface but NOT Lore, Destiny, or Hybrid.
AE arcs get a switch the author can move to enable or disable each tier of Incarnate abilities within their creations.
Incarnate content (including all DA content, Number Six, Belladonna, Sister Solaris, Apex/Tin Mage, and iTrials) stay as they are now.
That is my proposal.