From what I can deduce, this game looks close to 'Lord of the Rings', being cooperative and sending Investigators (Heroes) out to overcome whatever the game throws at you. The main differences will be 'Theme' - Lovecraft has been well tried and tested - and the use of 'Dice' - this mechanic has replaced cards before and worked. Wether another co-op game is needed, is a matter of conjecture. It seems to be the 'flavour of the year' at the moment. It is the trend. D&D spawned hundreds of role-play games - Magic did the same for ccgs - Dominion led the way in deck building. History teaches us that once a 'new' concept is born, there will be countless clones. Some will improve, some will fail, but imitations will continue until the next big inovation comes along to start the next trend. Probably like you, I will want to know a lot more about 'Eldar Sign' before commiting to it. Cheers!