Just an update with suggested changes!
For the hero I made the image ‘less glossy’ and removed the orange balls / stars altogether. The tag line has been changed to what the CoreOS team came up with 
Also changed the button next to ‘Download’ to direct to the release notes.
For the supported platform sections I made the logos smaller and changed them to their icon + word-mark logos (where available) instead of just the icons.
One thing that I haven’t included was a use case for CoreOS. I’m not certain what I could put for that. If anyone has any screenshots or example of how they use CoreOs that would be greatly appreciated.
Thanks again for all your help / suggestions! Let me know what you think 