Sorry for the confusion. We will further clarify that sentence to limit future confusion. Your free migration is part of the C-8 purchase and if you don't see the tile in your C-7, you will not be stuck. We will resolve the problem so you can seamlessly migrate to the new C-8 hub.
Both of those reside in the hub's database, therefore will be restored on the C-8.
Yes
It shouldn't be, although if there are any issues with your CoCoHue integration, I am sure @bertabcd1234 will be happy to help you out.