Well we despised Super Ships in ICW because well, the engine is awful at handling them. There was really no way to accurately represent them in the EaW engine. As well, they encourage the worst sort of fanboys who want to add every ship they can find without regard to balance or even considering why on earth we would put them in in the first place. And fact remains that they were amazingly rare in the SW universe. Only the most powerful people in the expanded universe ever had even one, and usually they weren't actually committed to combat most of the time for fear of losing them. In the ICW timeline they are pretty much irreplaceable, outside of the Emperor's fleet. And in a larger sense, they were almost entirely worthless. Sure they may dominate most battles they are in, but for the price of one you could field and support a much larger fleet of ISDs that would be much more effective in actually fighting your enemy. SSDs can only be in one place at a time, and considering that the ICW was a galaxy wide conflict...well it's far more useful to have 25 ISDs that you can send to 25 different battles at once than having 1 SSD that you can send to 1 battle...and then lose the other 24.