I don't see this as a loss of `brand:website`, but an improvement of `website`.

Personally, I see very little value in `brand:website` when there is `brand:wikidata`. It can be auto generated.
https://www.wikidata.org/wiki/Q41171672#P856

Then it can be updated in a single place, where as if you wanted to change `brand:website` on every object it would take a large changeset or years.

However I wouldn't object if you wanted to add `brand:website`, I just wont be doing it myself.