This is probably a question best answered by Sytner but what I can say is over SWG's lifespan there have been a lot of people who have attempted to revamp shadows.
I would say none of them have really been successful aside from making them a little more faint to better blend in with darker environments. The game is old now, very very old so the shadows being so sharp and snappy is no surprise really.
I think the best option is to wait for our resident graphical genius Sytner to add epic high resolution soft shadows, volumetric clouds and seamless space to planet flying. I have no doubt they're all on his mind in some shape or form
But to give a direct answer no I don't think there is any easy way to fix them and the tweaks I've seen in the past have been so minor a lot of people wouldn't notice. The one thing you can feel good about is they aren't half as bad or buggy in pre-cu as they looked in NGE.