I wouldn't stress about it, I spent the last 20 years of my RAF flying career with an A3 G4 Z1 category(bad back!) and the only thing it stopped me doing was flying on bang seats! Even the badly worded and misleading 'unfit service outside base areas' caveat didn't stop me being deployed to the sandpit or operating as a multi-eng captain worldwide!
The medical board Doctors are very sensible and will do everything they can to keep you flying but it's important that you discuss any restrictions they place on you with them to make sure there's no ambiguity in the paperwork which could be misinterpreted by a layman at a later date.
If necessary ask the board to put in writing what you ARE allowed to do so that you can wave it at dimwit 'cover my arse' execs when they panic because you've been downgraded!