1. Math in commands. EX: /setblock ~+1 ~-10 ~/16 minecraft:cobblestone (This would allow math to be involved, this could also be used for other values in command)
2. Multiple Commands in one block(I said this in another post) EX: /somerandomcommandorsomething ; /anotherrandomcommandorsomething (Seperated by a semicolon)
3. Physics Blocks. These blocks would have basic physics applied to them, like gravity. Actuator blocks should be made with this, like motors and better pistons.