From what I hear her blog and G+ stuff, etc will all be deleted within 12 hours? They're not wasting time
It always sucks to lose a girl due to poor health. I never noticed her being that thin, but if that's the cause of these troubles then continuing with her model career may not be the smartest thing to do either. I felt she was the most entertaining during the Ariyoshi episodes linked above, so perhaps she can find a spot in the world of variety...
Kaoru made quite the impact when she first came around. Magazine spreads and plenty of exposure. However, I think she would have never been able to reach the top as an AKB48 member because she already "had a life" before AKB48. She's not one of those girls you can follow from the very beginning and see her progress. She came into the group during her modeling career. In fact, I think that's the reason why SDN48 never made it big either.
Anyway, still sad to see her go. Now we never know what she might have accomplished and we're definitely missing out on many more lol moments.