A plane filled with ideas. Mostly bad ones, unfortunetely.
20mm rear gun for increased defensive capability: too heavy to aim, too few ammo in clips, impossible to reload in flight.
Small rudders, positioned low for maximum firing range: total instability in yaw, combined with fragile landing gear... oops!
Ultra-aerodynamic Mercier engine cowlings: engine maintenance made impossible. Too bad they needed a lot.
Typically over-engineered plane.