Thank you for your detailed feedback!

It should look pretty clean, unless you have a browser that always shows scrollbars. What browser and operating system are you using? I think Windows and IE might show scrollbars more. Should look good on majority of popular browsers like mobile and Chrome. But if you give me more details I can look into how it looks on your side.

I did try adding a stronger header look before... but it ended up looking too busy and heavy. Right now I'm trying to lean towards minimal and clean as possible consider the amount of data going on. If you can give me a mock up of what you are thinking I would love to see that!