Better Custom Blocks in Add-ons

As of now with add-ons, we can only make the usual 1×1×1 custom blocks. I want it that we're able to give custom blocks their own geometry. This is so that we can properly make custom-sized blocks like mob skulls instead of using the alternative way by using entities. Also, what we can only edit is their drops, light emission, and other common details. I want it that we can add custom functions for them too like our own custom block with a GUI kind of like the crafting table/furnace to more complicated ones like the respawn anchor. You're doing great with the how we can customize entities. I think it's time to give blocks the spotlight.