Most notifications are for non-technical end users. The language in the OoB popup notifications is full of IT jargon, something that end users do not appreciate or understand. And sometimes there's more they need to know about the update. If the tool allowed us to edit the body of the popup, our end users would be much much happier.
I absolutely agree with Chris... We also need to change font, colors and style...
Yes!! And also add the ability to add custom font style and colors so that it can match corporate branding! That way users are less likely to think its some type of phishing attempt and more likely to actually pay attention to the notification!