I’ve posted theMay update for Project and Project Server 2010 and 2013 over on the Project Support blog – http://aka.ms/msprojectsupport (new short-ish Url)…
We do have an ongoing issue with OData in on-premises Project Server 2013 – more in an upcoming post but we are seeing failures with datasets when the page limit is exceeded – (100 records). This was introduced in March 2015 and will be fixed in June 2015.