It's not that easy to end a conservatorship and it's definitely not that easy to get her kids back. It's not like those kids are some cars or something, just stored in a garage waiting for her and all she has to do is ask for them nicely. Even if her conservatorship was ended, getting her kids back is a whole separate deal.I bet that once the court stuff goes away (& she has a couple of big cases) she'll apply for it to end & get her kids back.
Generally, judges hate changing custody deals unless there's a dire need to on behalf of the kids. (Remember that judges are supposed to act in the best interest of the kids, not what the parents prefer.) Judges are also hesitant to change things the longer they've been in place. In Britney's case, her kids appear happy and healthy with things as they are (Federline with custody, Britney with supervised visitation). At this point, that same deal has been in place for most of the kids' lives, and I can't see any judge worth his salt suddenly deciding to rip two kids from their father's custody, where they've been thriving, to live with a mother with Britney's history. Certainly that will never happen while she's under conservatorship and has lawyers arguing that she's too mentally incompetent to even be deposed. All Federline's lawyers would have to do is to use her own lawyer's arguments against her.
Conservatorship is not a legal ploy. It's not something you go and get when it's convenient, say to avoid a lawsuit, and when you decide you're done you just saunter in and get it lifted. It involves extensive hearings and lots of detailed medical evidence for a judge to determine that a conservatee is incompetent in the first place. Then there are continuous hearings and court supervision after to make sure the conservatee is getting adequate care and the conservators aren't doing any funny business. In Britney's case, she's not even just under a financial conservatorship (where others control her money because she's been judge unfit to do so) but under a personal conservsatorship as well (where it's been determined that she is too unfit to make personal, medical or legal decisions for herself).
Records in one of the custody hearings, before the conservatorship, were sealed because Britney's lawyers successfully argued that they contained confidential and potentially damaging details about Britney's medical condiition. No doubt whatever it is also is the thing that factored into her conservatorship. The fact is that most conservatorships end only with the death of the conservatee, because most are imposed on elderly or very sick people. A young person getting put under permanent conservatorship is rare, so whatever she has must be severe. And the fact is that severe conditions like that, whether it's schizophrenia or bipolar or whatever she's been rumored to have, do not just spontaneously correct themselves. She'll no doubt be able to maintain if she's under medical care, but she's never going to get better.