Before 'upgrading' from V19 to 2019.1, I would print invoices to PDF to email to customers. These files were about 10kB. The same invoice printed in 2019.1 is a whopping 454kB. I am almost embarrasse...
I have just done a payroll with the new 2019.2 release. With the Payroll Advice, I have found that, if I Export PDF, I get a file of about 345kB (unacceptable). If I print to a 'print to PDF' print driver, the same report is 'only' 63kB. With MYOB V19, the same report was less than 3kB. I hope this helps you to fix this problem.