It doesn't have a campaign like Battlefield or CoD but like for 80% of the players who play these games, the singleplayer is uninteresting. It's all about the multiplayer and how you will play it hundreds of hours.
It's one of the best shooters I've ever played and I play games for almost 30 years now. This game will be much cheaper for most people as most other games if you talk about the costs per hour playtime.
If that justifies to ask for the same price as for other AAA games is another question but at least for the players it justifies to spend so much since they know how long they will have fun with it especially with all the free updates it will get.
And you can be almost sure that Blizzard will really support this game, many other devs don't really do much with the game after they release it even if it has bugs and stuff like that.
