While parents don't have the same experience as the local authority in care proceedings, their solicitors are likely to be experienced. I myself was supervised by a solicitor who was much more experienced than any of the local authority ones. She could, and did run rings round them! So I absolutely do not accept that joint appointment automatically has the effect of giving control to the LA. It just doesn't. I have personally witnessed parents solicitors taking control in this matter. And I say this as someone who isn't a defender of the status quo.
John, if you're concerned about the rights of parents in care cases, I suggest you should also focus on their access to quality legal representation. All parents are entitled to a legal aid solicitor in care proceedings, regardless of income- it isn't means tested at all. But if you don't live in a geographical area where there's one available, it can be a nightmare. So I can envisage a situation where a parent living in a legal aid desert might suffer.
And there's also a problem because care lawyers as a group are older than the average solicitor, and young solicitors aren't entering the specialism in sufficient numbers to replace those retiring. Also, many firms are going to the wall eg Law For All, and this will only get worse with the 10% fee cut that has been introduced.