Maybe it has to do with this:
In compliance with ICAO Annex 13 Preliminary Report shall be released within 30 days after the accident. However, as the Accident Investigation Board of Turkey (KAIK) representing the State of Registry and Operator has expressed a wish to review the draft Preliminary Report, it will be released after comments from the Turkish Accredited Representative have been received.
This statement was released by MAK on feb 17th
The Interstate Aviation Committee (IAC) - official website
So the preliminary report was available in time(!) but the Turks wanted it to "review". Interesting the "review" took longer than the preliminary investigation!!! As a result the mentioned recommendation (ATC) may have been placed to take away some of the catastrophic failure of the flightcrew.