Floor problem Lunar Cosmos 564 2015

Hi when my van went in for its service I asked them to have a look at the floor in front of the sink as I thought it felt a bit bouncy. When I had the report back off the technician he said that it wasn't delamination as I thought it might be but a serious collapse of one of the bracing supports in the floor. A report was sent to Lunar with a claim for a warranty repair. Lunar responded almost immediately and sent detailed drawings and instructions on how the repair was to be carried out. This entailed as far as I could make out replacing most of the floor. When I raised my concerns with the dealer who will be carrying out the repairs they assured me that most of the work would be carried out from the underneath and would have very little if any effect on the interior of the van. Has anyone else experienced this problem with their Lunar built during this period as I have heard that Lunar were aware of this problem which was caused by build problem during that period