It's much quicker to add complexity than remove it. Dedicating some devs to cleanup while others continue trashing the code seems unlikely to work. An argument

It's much quicker to add complexity than remove it. Dedicating some devs to cleanup while others continue trashing the code seems unlikely to work. An argument against starting over is the same organisation that built a mess the first time is at risk of building a similar mess for version 2. You might do better by moving to the feature work side of that conflict.