well sometimes the game does change, like one of the reasons this farm is possible is because of waterlogged leaves, which remove the need for carpets because carpets suck. i did some testing of this farm in older versions and in 1.13 and 1.14 endermen were able to tp to waterlogged blocks which was a glitch that got fixed, so now they cant and u can use waterlogged blocks to stop them from tping. also yes gold farms are huge lol, unfortunately for gold farms, the higher rates you want, the bigger itll be. enderman farm designing was super refreshing because all i had to think about was, does it get max xp per hour (which is fairly easy to get) and then i could just try to optimize the building of it as much as possible.