I think if the whole hood is blacked out or has a solid middle stripe, something like that it would look more proportionate.
I do agree it looks a bit small in the pics, I'd have to see it first hand. Well I have seen them on a couple Roush stangs locally and they looked fine there, though not my cup o tea.
I'm more used to the wider ones from back in the early 80's. My 81 had a front facing scoop of a sizable nature. That had been opened up and made pseudo functional by the previous owner. I fixed it up some to make it look less ghetto than his job.
I imagine that putting on a bigger/different scoop or a shaker would be purely academic even with the stock on there.