So i was looking at all the new screenshots released at the GameSpy again and indeed, you can see certain graphical improvements, most notably the shadow system, better textures and skyboxes, improved material shaders visible on the ships hulls...

despite all that, the overall result seems bit lacking to me, and after thinking about it i would pinpoint this down to "lightning system". The light does look to me like its coming from artificial source and the shadows could have more contrast + they could be indeed softer. Even after this facelift the ships do not look plastic (meant as 3D) enough - this was my biggest gripe with the original Sins graphics compared to even such old game as Homeworld 2 or now upcoming Gemini Wars - and it seems to stay for now, judging by the available screens.

So here comes the question - me obviously not being programmer - if it was financially viable, would it be possible to rework the lightning, or would this require entire engine overhaul/replacement? Is there not any easy way to add more contrast, so the objects gain bit more plasticity? 

Other than this, the game is indeed shaping up great. Personally i was more looking forward to Gemini Wars, it being something new and fresh, while Rebellion despite all the improvements too familiar and unsurprising. I have to say now, though, after reading those 2 latest previews/interviews, my excitement levels rose up and the game is pretty much on par with GW in this regard (as far i am concerned). I want to add, the game with all those little additions and little improvements  it reminds me of CnC Zero Hour, which i consider to be the best multiplayer expansion for RTS game ever.... so we shall see...