I enjoy having other aspects to ship optimization that create for more design strategy than simply adding more blocks. One thing I would like that would be fairly simply for people to grasp, relatively easy to implement and quite logical and thematic would be to offer extra customization to missiles dependent upon the missile block geometry. Instead of having a fixed damage and speed for various missiles, have the two divorced from one another and dependent upon the length and girth of the block placement (relative to the output block facing). The wider the block placement, the higher the damage of the missile but the slower the speed (making it more vulnerable to point defense). The longer the block placement, the higher the speed but the lower the damage.
Note this would be the 'ratio' of damage to speed that would be changed, not the total damage and speed. A one block wide, four block long missile would do X damage at Y speed. A missile with eight times as many blocks with a width of two and a length of eight would do 8X at Y speed. This is not a means to create extra power with scale, merely a method to add extra customizability to ship design.
Note this would be the 'ratio' of damage to speed that would be changed, not the total damage and speed. A one block wide, four block long missile would do X damage at Y speed. A missile with eight times as many blocks with a width of two and a length of eight would do 8X at Y speed. This is not a means to create extra power with scale, merely a method to add extra customizability to ship design.