That's probably because an article about the "lack of TeamSpeak 5" wouldn't attract a lot of readers since most people are either happy with TeamSpeak 3 and may not even be aware that TeamSpeak 5 is in the making or they are unhappy with TeamSpeak and have since moved away to competitors.
TeamSpeak 5 simply isn't a "hot topic" right now.
Sadly, the "person in charge" is still nowhere to be seen. All we see are "regular" employees doing damage control and sometimes anonymous "
TimSpeak" marketing accounts posting marketing stuff. That's it.
An it's disappointing, like nobody at TeamSpeak is willing to take responsibility for the things which went wrong.