Thanks for the update Ross and great to hear! I would take an OML, better than nothing I suppose. Currently waiting to hear back myself.
I would suggest having some more in-depth allergy testing to see whether you could have a serious reaction. Have a look into allergy component testing or potentially even a controlled oral food challenge test.
If these show that your reactions aren't severe then the CAA may review your OML. All they know at the moment is that you carry an epipen which suggests you are prone to an incapacitating reaction. Some doctors give these as a precaution though and so it could have exaggerated the risk to the CAA.
My allergy has been deemed potentially severe after component testing, but the CAA immunologist has recommended an oral food challenge test. It will all depend on how many nuts i can eat on the day. Have encountered them in the past and like yourself only had a mild reaction - itchy mouth. Anti histamine has always sorted me out.
Hope you get the OML removed!