DW Benefit: you can make two attacks as an action, one with each weapon. All the damage of each of these attacks is halved.
Deadly Strike: Benefit: When you hit a creature with a weapon attack, you can spend expertise dice to add to the attack’s damage against that creature. Roll any expertise die you spend in this way, and add its result to the damage. If the attack is a critical hit, maximize the expertise die.
Sneak Attack: Benefit: Once per round, you can deal Sneak Attack damage to a creature that you hit with an attack. To deal this extra damage, you must have advantage against the creature.
Critical Hit: If your attack is a critical hit, it deals maximum damage. Treat all the damage dice you roll, including bonus dice from abilities such as Sneak Attack, as if you rolled their maximum results.
It's unclear to me right now if sneak attack work the same way as deadly strike in regard to dual wield. Meaning that it's clear that the damage you add with deadly strike is divided by 2, the damage you do with sneak attack might not be divided by 2. Was that mentionned and confirmed somewhere? If that's the case, at least the DW option would be very good for rogues, upgrading their damage in a worthwhile way.