Many problems with score edit and pdf-export

They have, of course. In OS X no 3rd party tools are needed for pdf printing.

Programs that use it have to implement it in a certain way to get all the benefits. Many programs do so, Cubase does not.

For the record, for me, the huge file size problem has been solved by sending links to drop-box type services.

The issue the OP spoke of has no workaround currently.