Snappity - thank you for your lengthy initial answer, which I found very helpful. And thank you Aornis for bringing the thread back on topic 
SarahAr - your response was, um, less than helpful
And worryingly, you seem to think that the spousal veto is some kind of irritation or irrelevancy
The problem I'm grappling with is that there are all kinds of situations where we require people who want or need to use a service to fill out complex forms and pay fees. Where objections are raised to that process, we tend to do things like simplify the forms, review the documentary requirements to ensure that they remain relevant and proportionate, and sign post where help (including financial help) can be found. We don't tend to do away with the whole process to make it essentially a request for something.
The intersex point is interesting (ie how to get a GRC where no diagnosis of gender dysphoria can be made), but I would think that could be overcome by changing the medical criteria to include a diagnosis of an intersex condition?
I agree that there should be some form of appeal process other than judicial review
I'm not persuaded by the "living with parents so cannot get own documentation" argument. Banks and other financial organisations similarly need to see things like utility bills, so adults living with their parents need to sort out paperwork to establish an independent track record, as it were. This isn't just something that affects trans people, it's more of a generational "can't afford to get on the housing ladder so still at home" issue.
On medical reports, I thought that surgery was not necessary in order to apply for a GRC? And if surgery had been completed, the report didn't need to be overly detailed ("vaginaplasty surgery completed on X date" type report). Similar to the details that have to be provided for a life insurance application, where the fact that I had gynae surgery when I was in my early 20s needs to be trotted out every single time
Do you know why there are only 40 doctors on the prescribed list? This seems like a resource and access issue, which is better resolved by expanding the list (if there are additional qualified doctors willing and able to be added to the list) rather than doing away with the list altogether