I bought BF4 Premium up front and was happy with the results. While I got additional weapons and access to DLCs early, I never felt like these items gave me any real advantage over other players, other than the advantage I gained from learning their characteristics two weeks earlier. I still play BF4 regularly, and I still get killed regularly by noobs as well as veterans. The reactive environments and ballistic physics are unique to the BF series, and they contribute to replayability that I could not find in CoD, Destiny, or several other FPS games.
I played the Hardline beta, which I was expecting to be just a GTA CoD clone. I was happy to find out how wrong my preconception was. Hardline adds new features while retaining the unique tactical elements of previous BF titles. I look forward to ordering premium for this title too. In fact, I'm trading in my copies of CoD and Halo:MCE to get this one. I'd trade in Destiny too, but I made the mistake of preording the DLCs for Bungie's grind-fest. Live and learn, I guess.