My characters can now correctly see within the effect of the Darkness spell, but their spells still function as if they cannot. For instance, my Warlocks, who have Devil's Sight, are both unable to aim an Eldritch Blast through the cloud of magical darkness. When trying to mouse over an enemy in the cloud, the tooltip says "Path is interrupted." I should be able to fire into the cloud.
Additionally, RAW, Eldritch Blast does not require the caster to see the target in order for a character to attack with it, so even if I don't have Devil's Sight, I should be able to fire into complete darkness and have a chance of hitting with disadvantage.