Thanks MEL. I've heard a couple of different speculations on how this will work. I've heard business will move to the temporary location or the new Gold location, and F will move to business while F/R gets re-done. There will always be someone not happy with the arrangement, I just hope its not me.
Executive traveller advises this as the order, but only mention the start and final complete dates. "First will be the Business Class lounge, followed by the First Class lounge and then The Private Room, with the KrisFlyer Gold lounge going under the knife in early 2021." But Kris Flyer Gold lounge is closed as of last month. It's all a bit confusing, but I'm more of a gantt chart guy when it comes to figuring out timelines.
As for how the new lounge offerings will compare, they report the private room will maintain its private dining room. So, Im guessing it will still be its own lounge or exclusive area hidden from the riffraff of the First lounge.