I figure the dumpster helps give you a spot to hide from range with start zone figures/slow start zone bombing and there's a chance to throw it at least if things end up on one side of the map. I could see just scrapping them to simplify setup if you don't think it's worthwhile, though?
The Thunderstorm hits on low enough amounts that I've definitely jumped up there for height before. The Tornadoes you more work around, but if figure movers get involved, they do more then. Also if a car gets thrown near them, that will trigger them, which I think is fun.
I'll leave time (over night at least, if not more) for comment but am leaning towards moving forward as-is if y'all support that.