PIP review (new style form) - criteria with no change but initial wrong scores

Hiya, hoping someone can help me. I am helping my sister who has uncontrolled epilepsy as well as depression and anxiety. Her PIP award period is nearly over, and she has been sent the new review form to complete.

It's my first time on the forum, so I'm not too sure how much background info you need, but I've added some at the end.

Question

The form focuses on changes, and we have a couple of those. But how do we deal with criteria where her needs haven't really changed but she they got it wrong initially and at subsequent attempts to get it re-looked at. I've read somewhere that we could try saying just that "My needs haven’t changed but I believe I should have received a score/higher score at my last assessment", and then give full description and new supporting evidence.

While this seems logical, I am a bit nervous that this might backfire because we might annoy the assessors as it applies to multiple criteria - it might look like we are being hugely critical.

The reasons for the incorrect points vary, but includes 1/ they just misunderstood or relied on pure observation which is not right for a varying condition; 2/ we may have not explained it well or didn’t have enough evidence, and 3/ the guidance to assessors has now been changed or clarified to recognise needs like hers.

Is there a good/best way of doing this? Ideally we would love a better outcome without the need for a full face to face reassessment so have wondered about just focusing on keeping the existing points plus a couple where we feel the evidence will get us the extra couple of points. Or will the fact that there are any changes and challenges mean a full reassessment is inevitable? In that case, we would be tempted to throw everything in for as many criteria as we can on the basis that if we are having to go through the pain we might as well try and get the higher award.

Any help, suggestions or examples of having already done this would be gratefully received.

Thanks

Background
She was initially assessed in 2018 and received a reply in May 2019. Although she was awarded the full points for mobility, she had nothing for daily living needs. She immediately asked them to look at it again but same outcome.
With my help she asked it to be look at again in 2020 - we challenged most areas and provided more detailed explanation but no further evidence. She was awarded 6 points - 2 each for Preparing and cooking food, Washing and bathing, and Managing toilet needs. But again nothing for the other areas, despite a lot of the comments being really odd.
We didn’t try again or ask for mandatory reconsideration. That was probably a mistake but she was too stressed.

Hi calon-Ian, so sorry they bullied your sister into feeling too stressed to fight for her rights. [It's what they do, and in most of our opinions no accident]. However now you have found this absolutely life-and-quality-of-life-saving site, there are very many of us here who have you and your sisters' backs.
Take me as representing lots - I started two-finger typing a reply because my husband's epilepsy used to be uncontrolled. So I'm close to how it is to lose your memory of a day or so of what you did, of special occasions, of places you went before, and so on. And what it's like to look "OK" but be in pain from a bitten tongue and unable to eat normal food for days. Even now he cannot drink his black coffee hot because the scars on his tongue are very sensitive. Assessors neither see, nor most of them care about, what it is like to wet or soil yourself as well as wake up with a blinding pounding headache. So well done to you for taking up the fight, and this time take no prisoners of DWP and their profit-oriented contractors!!!
May I pass on a wonderful idea from one of our trojan Mods - keep a journal just for your sister and you, or encourage her to if she can, of what she CAN do and DOES achieve, this is to balance for yourselves telling the real whole truth to DWP which tends to be depressing.
Very very best wishes,
Denby