Just to clarify our policy on mega-threads: We want people to start new threads to discuss new things, even if it's relatively minor. It's easier for everyone to find and follow what they're interested in this way and there's no harm in a thread with only a few replies discussing something small like park map changes.
Construction threads are really the only exception to this as it's useful to keep this lumped together and in easy chronological order for future reference.
In this case a new thread to show map changes is perfectly fine and preferable to adding it to the construction thread because it's different enough. We changed the title of this thread from "Dreamworld minor updates" early on to prevent it from becoming another mega-thread.