Facebook likes moving fast and breaking things. Back in 2013 Facebook Mobile apps were really lagging. Acquiring Parse was the right step to help Facebook make their mobile apps awesome.
Today at 2016 and after Facebook had made a quite successful quarter (2105 Q4), generating a lot of revenue from ads on mobile. Now they just want to shut Parse down as they are done with it, to focus on their core business as they claim and may be to stop any one from building successful mobile apps more easily (Enough with WhatsApp, Instagram and alike apps – It should be just Facebook apps).
Actually Parse and Facebook were never made for each other, while the later company moves fast and break things generating ugly Facebook APIs and bugs, …
Parse have always been moving slowly and surely (like Apple), adding stable features and beautiful APIs. And may be that’s why Parse CEO left Facebook Last year.