Yeah makes sense.
Just a bit of context.. Right now the docs aren't built off of the old branches. What happens is we only upload from mozilla-central, but we do it to three places every time:
The first two locations get overwritten, but the last just hangs around until the expiry time. So once the cut-off happens, it's no longer possible to change those older versions (even if pushing a doc change to beta). The expiry was likely originally set to roughly match our release schedule, but our schedule is now shorter so the expiry should be updated. I'm not 100% sure how to do that, maybe we can add it to the WebsiteConfiguration API call.
But changing the name will involve actually running these tasks on the associated branches.