The X-Men line will be much tighter in Dawn of X with Hickman overseeing things and every creative team working closer together. JDW said it's similar to how AoXM was very interconnected and spun out of an event like how DoX comes out of HoX/PoX.
The original plan was to have the Disassembled Trio oversee AoXM but they were too busy to oversee it.