You expect that to be organized by the new guy how quickly? Give him a chance to settle in, work out what's good and what's bad and make some changes.
The club makes announcements on a fairly regular basis. What they don't do, quite rightly, is respond to rumours and speculation that crops up every 5 minutes. No club can do that, and it's a pointless task.
When someone has signed, they make an announcement. When someone leaves, they make an announcement. If it's not soon enough for the fans that's normally because there is some legal or business decision to factor in.