I think you have done most of what you can do as you have documented your concerns and reasons for the feedback. In the end this documentation could possibly support you if an appeal / complaint is necessary.
One bit of advice I was given at the start of my journey was that you must forget about response timeframes when dealing with the authorities .
Example: A PPU officer stopped responding to my emails concerning a discussion we had been having. I subsequently sent weekly emails asking for an update and referring to my past emails that had not been replied to. After 3 months I called his office to be told he had retire some months before. It took another 2 months for my new PPU officer to contact me and he did not know anything about the issue. I accepted this was not his fault and our interactions started on a good standing.
You could ask a solicitor, but they may say the same as I mentioned above or will write a letter. This again, seeings as you have only just emailed them, might be received by them in a manner not intended by you.
You do not have a date for the decision as yet and you do not know if there is any negative remarks so please consider the advice above on timeframes.
Plan your holiday and make the arrangements. Ensure you have notified them of your travel details and any contact details. Focus on your own well being as this means you are controlling your own responsibilities.
At times all we can do is wait and consider sending requests for updates at reasonable periods, i.e. every fortnight.
Learn from yesterday, live for today, hope is for tomorrow else what is left if you remove a mans hope.