If just temporary assigned to Cloudflare, APNIC shouldn't care if it sees a better use for the range. Supporting unintended uses only encourages various types of abuse. And changing DNS settings is easy enough.
That said, if a lot of people rely on 1.1.1.1 as DNS, it's worth considering whether reassignment qualifies as 'better' use of this resource. Not to mention the hassle caused by making changes to popular [anything].
That said, if a lot of people rely on 1.1.1.1 as DNS, it's worth considering whether reassignment qualifies as 'better' use of this resource. Not to mention the hassle caused by making changes to popular [anything].