I get the feeling Thrawn now knows exactly were the base is. He seems like he would have memorized all those planets.
I was thinking the same thing. Delete 1 planet, and as soon as he figures out it was messed with, he has you. What they should have done is deleted a wrong planet.
Outside of her brief appearance in the Kanan comic and her being a major character in the Aftermath novels I don't know anything about Rae Sloan.
Wasn't rae sloane in the pre-rebels book where kanaan and hera met?