I'd at least like to see those gigantic explosions do something more than just look pretty.
It just looks unsatisfying to see this massive explosion in the middle of the enemy fleet cause absolutely no damage or...anything, really. Even a simple physics jab to all of the frigates nearby would be an improvement.
This is especially so when a starbase goes up. If the Kol's railgun can split a siege frigate in two, then why isn't that enormous blast turning it into a field of burning scrap?