None of us really knows what kind of person she is. Based on the fact that so many of her kids seemed troubled enough to be willing to drastically alter their faces with plastic surgery, I can't help but wonder if she lacks something that other mothers don't. "Solid" people would not be willing to have plastic surgery to the point of being turned into what Michael and LaToya were turned into. So I have my doubts about their mother.
On the other hand, if people close to her, and experts familiar with her, know she's a solid mother and person; it would seem to make sense that the children be with their grandmother. I, personally, hope she is a solid person and wonderful mother and that the children can go with her. Of course, she isn't young; and the children could go through another traumatizing situation if she becomes to ill to care for them.