About the DB12 shotgun

I've been using the new DB12 shotgun for a while now, but I'm still unsure about its intended purpose and how to use it effectively.
At close range, the need to **bleep** it after every two shots prevents me from dealing consistent damage. At medium range, even using slug rounds, the damage drop-off over distance and the need to **bleep** it after every two shots at close range make it difficult to deal the damage I expect.
What kind of usage did EA have in mind when they released this weapon?