Bot API updates should have a ChatMember field, which contains member status information, such as group membership, permissions/admin rights, and status (admin, restricted, member)
This would help:
improve the workflow for creating bots which respect admin permissions. Developers no longer need to duplicate admin checks across bots.
reduce the requirement for bots creators to cache admin permissions. Again, reduces code duplication.
simplify update processing with fewer requests against a remote bot API. Fewer requests for both telegram and the bots == faster bots.
provides an anonymous way to pass the admin permissions of anonymous admins, without exposing the identity of that admin. No userid/name/username required; the permissions are enough. And since non-admin bots don't see anonymous admins when doing getchatadministrator calls, there is no way of reverse mapping the permissions to a user, which preserves anonymity.
Actually it's not quite the same thing, he said to put "ChatMember" in every update of type "Message"
Its not quite the same thing, but given that we've been given ChatMember updates which make caching much easier, i reckon this wont be added anyway. That being said... I still think this would be _great_ for anon-admin permission handling, so I'd still love to see it!