What do you think of the oakland raiders from preseason so far?

So far this preseason the Raiders look to have improved. We have a good running game, our O line looks a bit better, we have had some improvement in our group of young receivers and could have done without Chaz Schillens who is a huge bright spot breaking his foot. Our D line worries me a bit same old same old cant stop the run which really needs to improve. Our secondary is top notch. Im really hoping for a better season this year these last few years have been tough