In Forge of Empires they have a mechanism that lets you bring an event building back into your inventory (Store Building). You can move things around and then place it again later. If that existed in Elvenar I could pull obsolete buildings off the map, disenchant them and then have the ability to craft more things. Events and Fellowship Adventures sometimes offer rewards that are only slightly better than what I have. It isn't worth the effort to get it. But I would be much more motivated to work events and Fellowship Adventures to get new buildings if I could make use of the old ones rather than just deleting them.