How well will it perform depending on map size and "brickcount"? Will it limit your creativity like blockland is.
I'm pretty sure a lot of performance can be saved since you can convert bricks into a single object like he mentioned earlier
Also I got a suggestion, dynamic or custom player animations, let's say someone created a weapon but he also wants a custom animation for the player's arms so it fits with the gun he is holding, that could apply for vehicles and others, also ragdoll physics would be fun