So I don't think there is any value in smaller hulls... if you have larger hulls, use them. The only reason I employ medium hulls once I have large hulls in the game is because of production times and my desire to get X amount of power to a area in Y amount of time. If I'm given infinite time, I would always field nothing but Huge Hulls and then whatever sizes needed to fill in the last logistic slots.
The logistics cap and the inability to produce more than 1 ship per turn means that tiny/small/etc. hulls can never compete because they can never be fielded in the sort of overwhelming numbers needed. The small evasion bonus and speed bonus they enjoy does not compensate enough for this to be otherwise.
I can often produce medium hulls in a single turn, so why would I ever build a tiny hull if they also take a single turn? Even if production carries over its less HP and less Weaponry on a slower hull and its all "SLOWER" to produce. If a battle is happening tomorrow... do you want a Fighter to be built in time, or, an entire Aircraft Carrier? If it takes the same amount of time, then you always want the bigger asset.