We need to understand where are gaps in our testing to define common customer scenario and write appropriate test cases.

GSS prepared 7.10 quality concerns which should be base for the discussion and definition of appropriate test cases.  https://docs.google.com/document/d/1umFOUY6yX7nqTItY_BYgAaNDnTDNYUfMPcOM-mk2sCM/edit

As additional baseline we can use following docs with defect leakage data from few last releases. 

https://docs.google.com/spreadsheets/d/1MDbnEIEyNtF9veyijdjQ454ZEIfmJaDF8rBDmMnLEwU/edit#gid=1503458773