Ditto here, I would also like to see a link to these changes that you are referring to.
The only reliable information I can find is what's on the SENDIST website, and all it says is that there will be a new two-tier tribunal system allowing parents to appeal SENDIST decisions, and that each appeal will have a case manager who will ensure that all necessary evidence is available from the outset. Now, for me this is a very good thing, it sounds like SENDIST are trying to combat the irritating habit LEAs have of treating tribunals as a delaying opportunity whilst having every intention of conceding at the last minute.
I can't see any information anywhere about SENDIST starting to award costs (as you say that parent advocates could be liable for legal fees). SENDIST does not award costs and I would find it very bizarre if this would change on 3rd November, as my solicitor has not warned me of this possibility and we are in the middle of an appeal that will be affected by these changes.
With regards to LEA assessing (do you mean statutory assessment?) children without parental permission - they can already send their own professionals or NHS professionals in to assess, outside the stat assessment period, by requesting a direction from the tribunal.
Solicitors operating in this field are complaining about the abolition of the old case management period, as in the new regulations appeals are filed with full documentation from the outset. This doesn't give them much time to prepare for a case, as every solicitor operating in this field is absolutely overloaded with cases in particular around 15th Feb when lots of statements are finalised because of the phase transfer issue.
I agree that the consultation on this was shabby, but as far as I know IPSEA and NAS have been involved and I trust they have advocated on our behalf to the best of their abilities.
However, the law hasn't changed - Education Act 1996, Code of Practice and all the case law backing this up. The tribunal system is designed to be fair and user friendly, and I have done two appeals myself without any legal representation and won (I am a SAHM with no legal training). It is unfortunate that there seems to be (not so much on MN but on a few other SN forums I frequent) this notion that there is some kind of local government conspiracy against parents. There isn't, and the misinformation in circulation intimidates parents and puts them off from appealing. It's just a case of public services being underfunded.
If you have any further information, SWSC, please do link 'cause as Electra said there is so little info available that no wonder many people are confused!