Anti Kpop-Fangirl, the last to bring you the news, because we're not a fucking news site and I have a fucking job.
Minzy did what she should have done at least three years ago. In my terms, 2NE1 hasn't released a good song since "Scream" in 2012, and the group was last consistent in 2011. With Bom busy smuggling drugs, CL busy with her "American debut" without actually debuting, and Dara going into acting, Minzy hasn't really had shit to do.
Which precisely explains the plastic surgery she has received in the past few years. She knew she needed to get out of YG, but realized that every other agency has beauty standards. Minzy has been foreshadowing her leave for years now, and maybe some people who followed 2NE1 closely knew that Minzy was ready to leave. Dara's the only one I find attractive in 2NE1, and she has a derpface going on 98% of the time, so it's hard to look at her most of the time.