Declaring the dark lance or Drukhari OP is kind of laughable this early in the life of the edition. I'm not entirely sure it's actually even better than a disintegrator. I think automatic 2-3 damage weapons are extremely powerful, and I also have a buddy who spams quantum shielded vehicles with his Necrons, so I'm a bit biased. But, look at stuff like twin assault cannons, predator assault cannons, the exocrine's cannon (can't recall its name), and I think you will quickly see two things: the dark lance is fine and this is still a shooting edition. Melee is FAR more viable than it was in 7th, but ranged combat and the movement phase will still reign, in my opinion. Lucky for us, we have a great weapon that we can bring to the party.