I haven’t actually done the read through, so I can’t argue with the figures, but I will say that it’s a deadly universe for bad guys. How many Imperials survived A NEW HOPE, y’know?
I’ll admit, it is on my mind when I’m introducing new Imperial characters into the canon. That I know they’re likely going to have to be killed pretty quickly does make me question how to cast them a little more than I would in (say) a Marvel book.
Tolvan is an obvious exception in that she was created with a long term purpose in mind.