It would be interesting if Midfield was added to GTS. I wouldn't change much of your look, just add fence lines in the viaduct sector. That would give a feeling of reality. The traditional design is imaginable when the edges of the viaduct are only protected by a small wall. Like this:
I was thinking about Midfield Raceway after seeing someone had written here. I wholeheartedly agree that Midfield needs safety updates to not look stupid, same goes for Grand Valley Speedway. It's a shame Autumn Ring and Apricot Hill didn't make it into GT Sport, they look realistic enough to me!