The 20181009 update represents a stabilized version. While War of the Chosen is notoriously intensive, this update provides necessary technical improvements regarding load times and AI turn-time optimization compared to the launch state of the expansion.
To understand the significance of this update, we must rewind to late 2018. War of the Chosen had been out for just over a year. The initial launch (Summer 2017) was plagued by performance issues—memory leaks during the Lost horde missions, stuttering on the Geoscape, and agonizingly long load times between the Avenger and tactical layers. xcom2warofthechosenupdatev20181009incl exclusive