It's quite simple and very clever on GWs part. You don't need void shields or another LoW if you already have an established army and feel like you need a bit more of a boost. It's not banning Escalation or banning D weapons.
Just play the Alter of War: Escalation missions in the back of the Escalation book.
They are designed for one player to not have a Lord of War. The missions special rules help level the playing field even further. One mission gives a unit who controls an objective shooting attacks armourbane, fleshbane, skyfire(optional) and interceptor. Imagine a Dev squad with lascannons controlling one of these? Another gives the player without the LoW units outflank and acute senses. Grav/melta bike squad? More like Titan Hunter Squad. Another gives the LoW player a VP for each wound/HP remaining and the non-LoW player a VP for each they dealt. Pus three other missions and more rules I didn't mention.
All these coupled with the new Warlord table that opponents without LoWs get access to... It proves for a very challenging game for the player with the LoW.