I'm new to the game, but one of the first things i realized is the missing of trigger blocks. I don't know if this suggestion was already made but here it is:
A simple block, that can be connected with various other blocks (engines, doors, lights, whatever else may come). This block can be triggered manually - by walking up to it and pressing R - or by using it whilst in the core (similar to the weapons).
A simple block, that can be connected with various other blocks (engines, doors, lights, whatever else may come). This block can be triggered manually - by walking up to it and pressing R - or by using it whilst in the core (similar to the weapons).