This is Rust legacy, there is already Experimental exiting we are not aiming to make this game different then Rust legacy. Facepunch is doing a great job with that in Experimental branch. There are still some developments that are within the game if you see a few examples of servers like Northern Rust custom items and map or Raidersland Heli and custom plugins. Overall everything has to happen within the legacy keeping its nostalgic feel within the game without hindering the actual game by changing it to a totally new game.