Well, it's a pretty difficult design to improve on. Think of the Peugeot 206 when it came out in 1998. How
much has that
design changed with the 207 (released 2006)? Hardly.
The thing is, when you design a car that looks really cutting edge, it gets harder to design one that looks even more cutting edge. Unless you get rid of the wheels and slap some anti-grav nacelles on it, perhaps.
The only thing I can think of:
colour code the plastic trims and get rid of the orange in the lights. Perhaps offer Bi-Xenons and LED lights but I dont think they offer LEDS on any of their car range.
Audi-type LED arrays for the headlights; thin neon tail lights (actually, braised fiberoptic bundles lit up by laser diodes), a real Heads Up Display for the speedo; adjusting spoiler a la Porsche 911 (integrated into the rear windscreen), a front skirt that lowers automatically on the motorway at high speeds, but raises for improved clearance on slow, bumpy roads. Forward tilt & slide doors (and rearward sliding rear doors on the 5-door model). Keyless entry and start, recessed door handles that raise when activated by proximity sensors (keyfob comes near the door, and out they fold).
Type R could have a tinted glass bonnet to show off the engine (put some ambient lights around that
), that, starting with the headlight clusters, seamlessly transitions into the front windshield, then glass roof and rear windshield to meet the rear light clusters.