@ftxcommando like I said idk about mapgen because I didn't play it yet, it just seems less predefined than static maps that players played thousands of times over and already know exactly what each unit should be doing for first few minutes down to individual reclaim and move orders in queue for each, than when they play a map that never existed before where they follow some more general sequence of actions
the point is that you need to know all this "overhead" startup stuff in ladder just to start the game on even ground as the players that already know it, which is different on every map that is randomly picked even if ever so slightly, or you will be behind your opponent from start which only escalates farther into the match, and like I said, maybe build order is not the term for it but that doesn't make it not exist or irrelevant