I have dealt with Freeborn a lot. Like Duir I had one of the original Spitfires with the bushing problems and was offered a very good price on the Dixon. After a year one of the bottle bosses was coming loose. I sent the frame back to Joe at Freeborn and he fixed the boss, put in a completelty new pivot kit, serviced and added a volume reducer to the shock. There was no charge for any of it.
In my experience Freeborn will do the best they can for their customers. If DeVinci aren’t going to support warranty claims for shimmed seatposts then that is their decision. It is hard on a small business like Freeborn, expecting them to take a £350 hit on a new front triangle and then slating them on here when you don’t get your way.
Its pretty common for expensive warranty claims to require the return of the broken part. I would have expected Freeborn to give you an honest appraisal of the warranty issue and more than likely to build your frame back up and service your shock while they were at it.
The other thing you need to accept is when you buy an expensive piece of sports equipment from the far side of Europe, you might have to send it back if something goes wrong. Its frustrating having to strip the frame to get it looked at but its the only way to get it sorted.