I think that this is one of the main reasons, thinking that it is just portrait mode support. It is an added feature which you dont have to use as well as the new camera which can easily be changed back to the original. The new media player is not intergrated in neither testing nor stable.

It has fixes to the OS as well as support for a newer version of qt, which is where this question I have stems from. There is a new version of cutetube qml in extras devel that users are having problems with because of lack of support for the new qt modules.