You could just plow through the story and ignore a lot of the side stuff and be completely happy. In fact, you'll probably get a good 20 plus hours out of that. However, if you choose to feed all the animals, collect all the treasures, complete the bestiary and find all the beads you'll find it very rewarding without being too tedious.
While the awkwardness of the campaign mode's storyline is unfortunate, the game more than justifies its cost in terms of inventive mechanics, a refreshing setting and a well-thought-out realtime tactical system – all without the looming threat of microtransactions and booster-pack expenditures that so often are matched up with any card-based game.
It's frustrating to see the same developer who gave us the decent campaigns of the Bad Company games continue to fall flat with the story modes in the core titles. But while it feels as if DICE is standing still while the industry passes them by in terms of single-player experiences, they continue to innovate and raise the bar for multiplayer warfare. With new game modes, an enhanced interface, evolving maps, and greatly improved small-scale battles, Battlefield 4 continues the franchise's trend of setting the standard for the squad-based multiplayer shooter.
Ghosts doesn't leverage the PS4 beyond providing a more visually immersive experience, it stands as a more than capable bridge for the franchise. While the campaign is relatively short at eight hours and at times feels very derivative, the high points really shine and the multiplayer experience continues to set the bar for the genre.