They also didnt want a process entirely decided by the hierachy...
Seabasing walrus will be alright. Im thinking it might be a nice complementary unit to the premium sunderland
Edit, i dont really see much value in 'final sisters' - they dont vary game play significantly. Its really just about names on cards in binders.
However, a few get sprinkled into each deck, but there are lots of competing demands to consider. Courageous simply isnt interesting enough for someone to mount a campaign to get her in