So I had a couple ideas that could be added in at some point during development, I'm going to keep this somewhat short and sweet so it won't be a huge hassle.
1. A 3d Model System: I think there should be a system within the game that allows the player to access a table/machine and design their own material. Just as real human civilization has it's own diverse cultures, people could create their own hats, muskets, swords, axes, tools, house style, clothing style and even down to what kind of markings go down on the wood in their longhouse or totem pole. (unless you planned to add this in with the release of schematics. if you didn't then here's your inspiration.)
2. I can't stress this enough, player Accessability. the idea of adding in Lua files and components are great, but i have to say that it is imperative for the server owner or singular player to be able to access this game in a way that most modern games won't let you. if they want to have the ability to custom build their world to their needs or to add fire damage to a sword for an "RPG" server they want to start up like minecraft then they should be able to do so. whether it be from console command or mod or addon. customization is imperative and you guys are definitely going in the right direction. the ability for this game to become a "multigame" like minecraft and the current potential is extraordinary. you guys are (if you play your cards right) making the next big minecraft. Whereas minecraft is the CoD of sandbox games, this will be the Battlefield series of sandbox games. it will become it's equal/competitor.
In short, if someone wants to host a fantasy server on some sort of island they made in an editor fighting giant dragons and underground goblins or if i want to host a server set in 1916 Europe charging the Germans with the Russian army using bolt action rifles and tanks/mortars or building my own world with its own lore and a steam punk theme, it should be do-able.
Thank you for reading my suggestions and i would hope that this sparks new idea's and/or becomes a feature of the game for the entertainment of the masses.