I have to say I used to watch David Muir every night but I have recently switched to CBS nightly news for a few reasons.
They dont start every show with what seems like 5 mins of what the news is that they are going to cover. They also don't start every night with BREAKING NEWS. After the first 5 minute intro David Muir starts by repeating yet again the top two news stories.
Meanwhile over on CBS they are already into their second story, so consequently I get more news from CBS.
My suggestion is get back to doing the news and not making it so dramatic.