Their playstyle requires insane amount of coordination and practice. You basically have to commit your team to playing this way and practice it everyday, its not at all easy because it can be a double edge sword when you push too much and lose track of what's happening on the map. The reason why they find much more success is that their aggressive setups has a lot of layers to them, when one of their players die someone else is there to trade right away, on top of ppl lurking and flanking.