I said it before and I'll say it again - NOTHING can replace lightness and as soon as anyone tries to add power/grip to a Micra, I'll bet its handling goes downhill in a screaming rush. It's why the MX-5 has never received the massive power boost, mega tyres/wheels treatment from the factory 'cos it won't work.
The base model Polo Up! will be interesting on this front.
And if we are going to continue on the "cheap crappy korean/where ever its from, car like that" theme, I once had a great time harassing a rather agitated Ferrari 308 through some nice winding, roads in Vaucluse in a rental Ford Festiva.
So are you gentlemen up for the Queen's Birthday track day? I'll be doing it again and so will pauld.