Robotyne is a problem for both sides. Every building there has been leveled so occupying the village is basically administering a death sentence by FPV drone to anyone unfortunate enough to be stuck in that hellhole. Its better to just attack around it and have the Ukrainians just abandon it, taking it in a front assault would just be a serious detriment to the integrity of the lines since the Ukrainians would be the harvesting exposed troops. Marinka is effectively the same thing, everything is rubble, its a serious problem for the people tasked to hold it. NATO has to be one of the worst military powers in history, even decayed powers like The Ottomans Empire or Austro-Hungary during WW1 had more fucking sense than NATO planners. Ukraine should have been erecting significant defensive lines the moment the lines started calcifying back in late 2021, this is something that can be done at the same time as preparations for offensive actions and its extremely beneficial for each unit to know where to retreat to in event of a breakthrough or a total failure during the offensive. As it stands now they just have basic trenchworks along the frontlines, there has been absolutely nothing on the order of the Surovikin line far as I've read.