It does look a little thin to me, especially when you see it held up to the light.
That said though, with a good cut and some layers, I believe it would only be you that would notice the difference between wearing it and how you appear with concealers.
I would definitely up the density on your next order, but use this to get used to wearing.
One other alternative would be to send that back and get an interim stock to tide you over.
It's hard to say from the pictures, but I would have thought you might be able to get a stock system in your hair colour, that would be more dense.

I feel for you because I know what you're going through.
Best of luck.

PS. The crown won't be in a set place. A bit of water and a blast from a hair drier will allow you to reposition it to where you want.