Oh crap, seems like not too many of you guys figured out I wasn't really serious when writing this topic
Anyway even if I was serious, a spoiler (be it a fixed one or a pop up one like I suggested) has it's function even on a low powered car like ours.
I think we all have felt already that when you go really fast the car starts to feel a tad too light on its feet.
Can't really tell how big the impact of wider wheels and lowering the car would be as I still have to make those changes to my car. But plain stock it could use some more downforce -imho-.
Hypothetically speaking a system like it wouldn't necessarily have to be heavy nor should it take that much cargo space.(realised that when I opened the trunk earlier today,there's plenty of space right under the trunk lid).
Ah well, let this topic rest and let's enjoy our cars some more !
