J.J. Abrams grew up with Star Wars. He's a huge, lifetime fan of the franchise and with his decades-long nerd devotion to things from the pen and typewriter of George Lucas I can't imagine him deliberately torpedoing the Saga and/or not caring how the story's executed. There's a true, born-and-bred fan of the Lucas universe in charge of one of the films, and while not everything Abrams has helmed has been great he's made enough good product that I have faith he'll direct a good film.
Will it be on par with Hope or Empire? Likely not, but then again it could be one of the best films in the entire franchise and surprise everyone with just how good it is without the aging, rusty George in the director's chair.
All I know for sure is: we know nothing for sure. Claiming that all films, TV projects and novels from this point forward are going to be stinkbombs because of the Disney corporate logo is presumptive and downright illogical.