Enjoyed playing this yesterday.
My biggest issue is the same a lot of people had, roof access. It was just the scouts jumping on the small roofs that was the issue, but soldiers/demos raining death from above on the roofs near the dish.
As far as a way to keep some roof access but prevent scouts from being able to jump across the whole map, I'd suggest making the little building near the train bridges larger/taller, so that scouts can't just keep jumping through. Could possibly add a second story with access to the back, or a tunnel that connects it to the main building. Just random thoughts, but making that building an obstruction to going any further might be the best idea.