irl, the dark bit isn't as bad as the floodlights are really really high, and so cover the whole surface of the ptich. i.e the 2 floodlights you have at the end of the ptich would be much taller, and also in the corners.
in the pics i posted before, the lights on the actual stadium cover the whole thing. and as you're using these, there is no need for the floodlight stands down the side of the pitch.
the roof is starting to look good
is there potential to add more than one tier to the stands? then you could have banners over the highest one giving support for each team. and also how about making the side boards have advertising?
and also dugouts