I did not mean that the entire foredeck should come off but only back to the main bulkhead. How much damage is actually done to the beams in addition to the kingplank is not shown and will probably be clear when you have full visual access. The forward part of the foredeck would be buckled if there were damage to the stem/bow area so I doubt that is the case.
I devised the router technique to remove a large damaged plywood panel from a 24' trimaran some years ago and the interior frames and stringers were not affected at all. After installing a new panel and fairing it in, the repair was invisible. I'd expect the same success with your boat. How much of the foredeck needs removing will be clear when you get into the job. There is an obvious point at the forehatch shown by Graham that will be easier if there is no damage beyond that.
The bad news is that we sometimes break our boats. The good news is that, since we built them, we can also fix them. No boatyard bills involved.