Why is it so hard for you to understand? They have to focus on important stuff first! Means make core stable.
However seems they plan it in update 5. But I hope they prioritize other important stuff first. since there is more stuff that still need to get solved. Such as the known issue list theyr published with 4.
Also Qt5.2 and more libs allowed on harbour is way more important than MMS because more libs means more apps.