I believe the interior design change requirements are a bit too harsh. I don't see why we are forced to have all items removed to storage, just to change some minor textures and wire frames in the house. I understand that clipping is a thing, but that can be done normally in the house anyway...
Also... finding that many open slots to even change interior, is way too drastic. I've been maxed out on furniture storage for most of my houses for like 5 years++... and that is with constant vigilance of removing items I don't need. Finding 400 open slots for a large, is very difficult. This should of at the very least had a storage increase to accommodate this update.