Responding that way to the caseworker is not a good idea, however much you want to send such an email. Write a draft, then delete it. Remember, any correspondence may one day be read out in court. You don’t want to be accused of sending malicious, vexatious &/or unreasonably persistent communications either. Such allegations from LAs are becoming increasingly common.
When was DS 5? If DS turned 5 before the start of this term, he is compulsory school age and the LA has a duty to ensure he still receives a suitable full-time education if he can’t attend school full-time. Have you requested alternative provision under section 19 of the Education Act 1996?
If the nursery/school needed more funding, did they apply for early years inclusion funding/high needs top up funding?
Are the reports detailed, specified and quantified? Or are they vague and woolly? The content of the EHCP is based on the evidence, so if the evidence is rubbish, the EHCP will be too.
Have you spoken to your preferred placement? It isn’t unusual for LA consultations to all give part of the picture or an inaccurate picture.
Is your preferred placement a unit that is part of a mainstream school? Most units that are part of mainstream schools are not separate registered institutions, so the mainstream school is named in I and the provision provided by the unit included in F.
Unless your preferred placement in wholly independent, the LA must name them unless the LA can prove:
-The setting is unsuitable for the age, ability, aptitude or special educational needs of the child or young person; or
-The attendance of the child or young person would be incompatible with the provision of efficient education for others; or
-The attendance of the child or young person would be incompatible with the efficient use of resources.
The bar to prove one of the above is higher than many schools and LAs admit. Schools can be named even if they object.
The LA is misrepresenting the research about TAs. Something that isn’t uncommon. A well trained 1:1, deployed correctly, does not have to lead to dependence. Michael Charles, a well regarded SEN solicitor, once wrote an excellent piece on this.
Unfortunately, many have to appeal once finalised to secure the right provision and placement. If you don’t want to appeal, then you may have to accept DS won’t get SS (either just not now or not until a later date).
Also, unfortunately, the JR process starting with a pre-action letter is the route to force the LA’s hand wrt timescales.
You are at the beginning of what is going to be a long journey. It will help you both if you can get to a stage where you can advocate for DS. Have you had counselling &/or EMDR? Some find antidepressants help. Reading IPSEA and SOSSEN's websites is a good starting place for understanding the law and what should happen. This might help you feel more confident in what you are saying/asking.