If the settings and map allow it you can capture a dozen planets and make a trail to the Dyson Sphere and then have Gatlings all over your base for defense.
If the settings and map allow it you can also capture a dozen planets behind a single choke point, with a gravity drill, and a hundred thousand turrets - including spider turrets.
My point is sometimes the map falls such that the player can be well defended by circumstance, is there anything wrong with that? Remember you cannot capture the Dyson Sphere every single game. I'm not opposed to some minor faction tweaks, but I'd hate to see a poorly executed nerf effectively remove them from the game. There are diverse options to make the game harder, we need a few options (besides just lowering the difficulty) to make it easier.