Idk what other people think, but for me, I think that medium-scope changes deserve a new champ spotlight if the champion's last spotlight was over 'X' years old.

Because there are some champions that haven't been reworked and might never really get a full scale rework since as their original design is still good, healthy, and relevant...but so much has changed about the game that their spotlight is nearly worthless besides just understanding the general idea of the champion... and it might not even accomplish that if the only people watching those ones are newer players who will be so confused by all the old mechanics, items, runes, etc that they can't focus on the content or feel like they can't really trust it.