We had here couple threads about that. If i remember right most of people here thought it was just ripoff selling of little modified BF4 as new game and Hardline is not very popular.
It was matter of principle things to me i dont buy full price of "new game" only for BF4 GTA-mode ripoff. I maybe buy it if its cheaper some day and others here buys it too and i can play it together with all belowed NRU-cocks. <3
Thought the beta gave a reasonable taste of the game though obviously incomplete. Whilst it was fun for a few rounds I'm not sure how much I would play it. At the time and for the price they wanted it was a definite no. If it was an awful lot cheaper (£5 ) then it would become a maybe. I think I have enough time invested IN "normal" BF's to not bother with it.
If it had been priced on the same sort of level as PvZGW which is something you can dip into every now and then I may have been a bit more interested.