Where is the air intake for the radiator ?
Do you have a belly pan ?
The mod seems easy enough to do, even using a piece of cardboard.
So yah - go for it.
I would speculate that it might channel air over the hood a tiny bit more, but that overall, the difference will be negligible.
If angled up or rounded though, you might see more flow over the hood and it might lower the stagnation point.
BTW : I copied your wheel spats :
