What I want to see is a 3 Section Star Destroyer with 8 or so Hard points, and attacks on the lower two body sections. It's third section, the command tower controls its large energy supply, and once the Command tower is destroyed(crippled) the ship can no longer change it's manuever dial from what it was when the ship was fired upon. It creates a cinematic weakness where eventually it will fly itself straight off the board, while still being powerful. From there make it so no more than 3 or hardpoints can fire on any one small ship, and give it Tractor Beams that can move ships around the field. I can see it all in my head, and I cannot imagine anyone not wanting to see that happen.(In total with hard points full around 175 points seems fair. With how many different tactical decisions a big ship can make every turn, having the really big one just seems amazing.
And Tractor Beams just sound amazing. Yank your ships from certain death. Pull little ships into your way and eat them. Etc.