in theory yes.
but specific DLC may not be your cup of tea.
the reason in my eyes for premium is to get the metro lovers who don't like "big maps" to purchase, at a discount, DLC which they would never buy. (armored kill,).
it may seem like they will lose out on profit with premium but in actual fact they are charging people for stuff they would never buy.
heir are console premium members who are complaining about the size of Caspian border/firestorm for its sheer scale. yet they've pre order at a discount armored kill via premium which they they will save them money....
yes it does give you new weapons. so would buying each DLC individually. the only thing you get exclusively as a premium member is weapon camo ,dogtags a unique knife a server queue priority.