One thing I would like is an mid-end game process that lets you go "Creative mode" for a short time. No flight, there are plenty of ways to attain that yourself, but some sort of tool that lets you insert materials either manually or with Drives (ie: AE2 paintbrush)
While you have said tool, all materials you've put inside it are accessible by menu, (maybe while it's equipped it replaces the normal inventory with a custom one) and it keeps restocking your hotbar with anything that matches. Maybe an integrated autocrafter so it can keep you supplied with stairs or other complex items. It never gives you more items though, just lets you hold mass amounts while still being able to build and craft on the fly.
Making it replace the normal inventory menu though means you don't want to have it on you at all times, so it would be a building item that you have to put away for normal Minecraft stuffs.
While you have said tool, all materials you've put inside it are accessible by menu, (maybe while it's equipped it replaces the normal inventory with a custom one) and it keeps restocking your hotbar with anything that matches. Maybe an integrated autocrafter so it can keep you supplied with stairs or other complex items. It never gives you more items though, just lets you hold mass amounts while still being able to build and craft on the fly.
Making it replace the normal inventory menu though means you don't want to have it on you at all times, so it would be a building item that you have to put away for normal Minecraft stuffs.