Having not played it and only watched it, I would say yes only because (even though you said for BR alone) the value is higher in that if you get tired for the BR you could play other modes. However, if you don't like the thought of paying $69.99 for a multiplayer only game I'd say no, I think $40 would be the sweet spot but Activision really hates price drops.
So maybe, in the end I'm saying no.
On the flipside I would expect the post launch support to be pretty good so the game should be updated a bunch (maps, weapons, other shit)