DO NOT fit EBC Greenstuff pads. You will probably make it worse. Something like DS1.11 or similar will be far better.
I actually agree in some regards. If you're driving a car exclusively on the road then, for example, fitting a set of cheap coilovers (or even decent ones depending) will harm its road handling, which is primarily what Renault's engineers were focused on, but improve its ability on track. I have some very decent coilovers on my daily driver and whilst the feel is far more sporty, on a bumpy, twisty road there simply isn't the amount of travel that the original suspension had. The stock exhaust is nice and quiet, but made from mild steel so rots for fun, and will also not make enough noise for some, which is a personal preference.
At the end of the day, it's a car that cost £15k new. It's not going to have the same quality of suspension that a Ferrari has, or the lightweight materials of a Lotus, or the horsepower of an Aston. For those wishing to fork out, there's always going to be room to improve it.