The other thing of course is that at the end of the crash diet, its still a golf - which is not as good as a designed from the ground up racing car like a Lotus Elise.
Normal car buyers demand comfort plus the EU demand safety (heavy body panels, safety systems, electronics)
Which I guess is why they just ramp the power up and not reduce the other things.
I still think if you wanted to add a lot of fun back, the wheels, tyres and brakes would go a long way towards it. Insurance companies hate it though and who wants to ditch their nice pretty 19's (that weight a metric sh1t tonne)