Have you appealed an EHCP?
Yes, more than once and supported hundreds of others to appeal. The sad reality is DC whose parents know the system and advocate for them get better support. It shouldn’t be like that, but it isn’t going to change in the foreseeable future, unfortunately.
Fine if you don’t want to appeal, but I mentioned appealing because your posts imply you think the EHCP is inaccurate but there is nothing you can do about it, which isn’t the case. If the EHCP is in accurate you could have appealed when it was finalised. In order to get the right of appeal again you could request an early review. Unfortunately, if LA refuse an early review there’s no right of appeal. You would have to wait until the annual review or request a reassessment of needs (which does come with the right of appeal if refused).
In the meantime, what happens with the child?
The current EHCP remains in force whilst appealing, so whatever is happening now continues to happen. An appeal doesn’t change that.
He misses out on another year of school,
I think you are confused, appealing doesn’t mean missing another year of school. The EHCP remains in force. Whatever is happening now continues to happen. And, appeal or no appeal, if CSA pupils can’t attend school full-time the LA has a statutory duty to ensure a suitable, full-time education is received
Siblings are less likely to suffer if there is an EHCP detailing, specifying and quantifying all the necessary provision because home life improves for all if the disabled DC’s needs are better met at school.