Sorry, if they were not aerodynamic they wouldn't fly at all, a brick isn't aerodynamic. Modern fighters are designed to be aerodynamically unstable for fast manoeuvre response so the pilot interferes with a balanced platform, not the same as unaerodynamic. Now a missile is a different case.
An aircraft doesn't need to be aerodynamic to fly, (just look at an F4, a classic example of 'you can make a house brick fly if you stick big enough engines on it'), but it does help with acceleration, top speed, and fuel economy.
Modern fbw fighter aircraft are designed to be 'mildly' unstable about the pitch axis for various reasons that include agility and fuel economy.
Someone mentioned previously about the Typhoon - pulease, get your facts correct before spouting garbage!
Getting back to the OP;
Yes, there's no 'mechanical' backup mode, due to there being no mechanical connection between stick and control surface. However, there are 3 or 4 layers of redundancy built into the control system to allow for multiple failure modes, the lowest one being an emergency hydraulic system and a direct electric link between stick and control surface, (this is as 'manual' as you can get).