because tim swiched and changed moria too many times and players hate to find new camping spots (riku) and they hate to get lost because of those changes
People like the gameplay of current moria because of how moria is shaped & layed out. which I am quite sure from what I can tell this moria is layed out almost exactly the same, only with less spots to get stuck in. Worst case sjoerdtim removes the map a month after he adds it.