No I am not wrong this is actually a new MP not just an updated version of the old one. You can install it side by side with the old one until you feel comfortable of using only the new one and this is stated in a Note on the download page:
This Management Pack is intended to completely replace the functionality of the previous DNS Management Pack, and as such it is not backwards compatible with them. The old and new management packs can live side-by-side, so you can uninstall the old MP’s if/when you are comfortable with the new Management Pack.
If you open the guide you can find even more information. This MP is structured in a different way which might be the new way of how management packs will be released:
I like this new structure because it gives you the possibility to enable more advanced monitoring by adding another MP that contains all overrides.
Also the announcement for this MP comes in blog post which is great. So far we noticed some new MP downloads on the Microsoft site and after a few days you may or may not see short announcement about new version of MP. But this time is different and in the announcement it is stated that the new MP was tested by the XBOX Live team which will be equivalent of beta testing. May be it is a good idea to beta MPs to be published on Microsoft Connect in order not only TAP customers and internal Microsoft teams to be able to provide feedback.
You can find the announcement about DNS MP here.
Download is located here.
As usual remember to read the guide first before deploying.