I think the current 2014/4K master of GB2 looks great as it is - lots of things look improved compared to the 2005 version.
I like the GBII 2014 Blu Ray overall as well. None of the official releases (1999/2005 DVD/2014 BD) are problematic to me. The only gripe I have with the 2005 master is the slight cropping. It’s just the first film I’m a bit more precious about. I just really want that 1080i HDTV version or a colour regarded BD version that matches the 1999 DVD.