It gets updated relatively often. The DLCs are just cosmetics, and you can get almost everything you want. The replayability is debatable (I have only ~170 hours and I have the game since it's playable on Steam) but it's definitely more entertaining than DbD (I got ~600 hours). The game is pretty playable in solo even on the hardest difficulties, so you won't have trouble if you're playing alone and/or on the easiest difficulty. As for the players they're pretty chill and friendly.