There are a lot of general things to be said about dustbowl which hold true. Don't dismiss them because they're sweeping.
For example, Dustbowl is incredibly narrow in the third stage.
In every stage, blu's spawns are easy to spam into and all the exits are within easy line of sight from each other. You know when you've been totally unable to push out from your spawn? That's why. It's particularly bad on s1 and s2 where the spawn exit is lowered so it's like a bit pit of not-fun.
In both 1-2 and 2-1 the defenders are approaching from 90 degrees to where the attackers are coming from, it's worse in 1-2 than 2-1 but there have definitely been situations where there's attackers on the point and as red, I'm sandwiched between attackers on the point, and more still coming from the previous point, it's not ideal. Ideally defenders would enter the battleground from one side, and the attackers from the opposite, with the point between them. That gives a clear "our ground" vs "their ground"