The modifications to the two endpoints will happen on or soon after December 16, 2019.
No, this will not be the case.
Great question! I want to refer to our stance in the stickied Data Protection Notice and FAQ - #2 by Veltarii-1769 post for the /character/{realm}/{name}/status endpoint, which is outlined in question #13 in the FAQ section. I would paraphrase here, but I don’t want to misrepresent any of the nuances included in the answer.
To help you link the /character/{realm}/{name}/status endpoint, with our release on or soon after December 16, 2019, we will be adding an id field to the /wow/character/{realm}/{name} endpoint with a matching ID value. Currently, this can be parsed from the thumbnail field, but we don’t think that’s a great way for you to make the correlation.