Dwarves have darkvision and resistance to poison. Depending on the subrace they also have bonus hit points or additional resistances and spell abilities. Agree that the Shield Dwarf subclass is a bit meh when compared to the other two dwarf options, but even with darkvision and resistance to poison are a notch up from human traits.
"He that can smile at death, as we know him. Who can flourish in the midst of diseases that kill off whole peoples. Oh! If such a one was to come from God, and not the Devil, what a force for good might he not be in this old world of ours."
-Bram Stoker, Dracula
| 
