How do you know that people will faceroll through the whole game? Have you played the whole game through all it's difficulties to know that they are making it way too easy? And what makes you think switching to the right skill set up will automatically make things easy? this isn't WoW where you can just stand behind your tank and the boss will happily ignore you. Don't bring your WoW hate to this game.
And i am glad that there is no single talent tree spec that can handle the whole game so i can use the same toon to play solo, with 1/2/3 friends and switch my skills on the fly when 1 more more people join for better synergy.
Oh and you would not give it more than 7 would you? So you would score a game without even playing it... nice. Makes it really easy not to take anything you say seriously.