allow the owner to delete messages
giving the team owner full delete/edit privilege will allow for the team to focus on the correct topic and allow for misplaced messages to be deleted by the team owner, also when deleting a message remove the visual display of "This message was deleted to allow the channel to flow better
Definitely agree they should remove the visual display of "This message was deleted" or at least have an option to hide it. Does this have an entry of it's own I can vote on? I saw one in Japanese but not sure if the rest of the text was relevant so I didn't want to vote on it.
To add on to this, If there are any inappropriate messages on a channel, rather than having to chase down a member to delete it (i.e. a student) and leaving said message on for a very long time for other students to see, you can take a screenshot of the message, delete it, and then discuss with the student about consequences.