Well then, in my eyes, there should be a server config setting for how much the jammer worsens the accuracy.
I have to disagree with you here, too. In a game that is played competetively, any change to the balancing of said game can have drastic impacts on the meta game. To give you an example, in the game DotA 2 (which I enjoy when I'm not busy abandoning builds in Starmade) a hero recently got a small buff - a little bit more armor and damage. While he was not unpopular before, he is now the most played hero and in virtually every game, and you have to change your game to accomodate this fact. All because of a single, minor buff. I know it is a far stretch to compare DotA to Starmade, but on the other hand, changing turrets so that they have the shield of their mothership is not something I would call a minor buff. It's changing one of the core gameplay mechanics and I'm pretty sure that this would have significant impact on Starmade's meta game, in the way that small ships become even less viable than before. Which I think is a bad thing.