Wonder Girls loses Sunye to marriage / family and Sohee to acting. I don't think Sunye officially didn't renew contract but it's obvious.
KARA loses Nicole to contract disputes / solo activity and Jiyoung to school. I believe Jiyoung's situation is unconfirmed but looks bleak.
9MUSES loses Sem and Eunji to "graduation" which is just a cover word for them leaving for solo activity.
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Wonder Girls is pretty much done. No way they can carry on. Sunye was the center of the group in terms of vocals, and a 3-member WG isn't going to work.
With Hara, Gyuri, and Seungyeon left in KARA, I assume DSP will try to maintain the group, but it'll be interesting to see how management moves.
9MUSES loses nothing "substantial" because Sem was a transition vocalist at best and Erin is way better than Eunji for raps, but this group was really climbing the girl group ladder and had plenty of potential this year. To have member instability for yet another year is ridiculous (and also why you don't have numbers in your group name).
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On a side note. I wrote up some girl group rapper power rankings.
http://terywj.tumblr.com/post/75141624643/bonus-girl-group-rapper-power-rankings-20-8
http://terywj.tumblr.com/post/75486791683/bonus-girl-group-rapper-power-rankings-7-1
Feel free to comment / critique / laugh / judge.