My initial thought on this is that this is not a good idea. If I truly wanted to see new features, I would start up a local session in creative mode so that I can explore or obtain items much quicker. But this is a multiplayer map with the chance of having my base/loot found which is the main reason I play on this server. I have to do things here to protect my stash. One should not expect to log in and see new content close to spawn. I feel that some of the players coming from PvE, where the map is tiny in comparison, will complain that they cannot move out far enough, fast enough, without hardship. Movement on PvE is night and day of that on Chaos. My first base is well outside of this 2k ring, well outside. The chaos map is HUGE, go explore it. I have not had any issues in finding chunks that contained new structures/blocks, even in the nether. You just have to walk away from spawn, and it might be frustrating for the new user, since they will likely die much more quickly on this server, as I have witnessed first hand while playing. Lots of rage quitting. But, as I stated previously, if I just want to see new blocks, I am starting my own local server/single player map, just to play around.
Resetting the chunks would have a direct impact on the MANY hours I have played on this server. I have lots of secret pathways, both in the overworld and nether to navigate from my various bases. I have not spent much time in these actual connections, so I feel like those would be wiped out, and who knows, it could expose a tunnel or something at a chunk border. Not good for my loot pile.
Thanks for posting this and asking for feedback!