Also, although I'm not crazy about the CGI enhancements, few of them are as bad as the image you've posted. It's a bit harsh to condemn that work based on the worst example from it.
Well... the biggest problem I had with the space effects were how overlit they were. It seemed like someone was always had a light shining on the Enterprise
. It ended up making it look cartoonish and didn't match the live-action elements.
The D-7 just looked incredibly bad and I had a screencap, so I used it.