Joining the EEA
You're assuming the UK would be allowed to join the EEA. I doubt they would. What incentive does the EU have to make it less painful for the UK to Brexit? Instead they have all the incentive in the world to inflict maximum pain, as an object lesson to other countries in the EU that might consider this route, because if another country leaves the whole thing will probably come tumbling down.
I suspect others who might be interested in doing the same thing (i.e. LePen and a Frexit) will be watching closely to see how the UK does. The EU wants you guys to suffer, and are not going to throw a lifeline other than maybe allowing you back in the EU as a full member in the future if you have Regrexit - but they would require FULL membership meaning goodbye pound.
Biting the hand that feeds IT
