"We have delayed the PC version of Naval Strike because we are concerned that the combination of the pack and planned PC updates would increase performance issues on mid-range to high-end PCs," reads an update on the Battlefield Blog. "We are working hard to resolve that issue now."
When it finally docks on PC, Naval Strike will bring four new maps, ten assignments, five weapons, two gadgets, and a hovercraft vehicle to Battlefield 4. The DLC also features a new Carrier Assault mode in which opposing sides fight to sink each other's aircraft carrier while keeping their own one afloat.
Battlefield 4 (Fall Preview)