As usual, as soon as I apply the newest RU, I do also a quick check for New parameters and defaults in Oracle Database 19.11.0.
New Parameters in Oracle 19.11.0
Based on customer feedback, there is one really big improvement since this RU release. Not only new features but also parameter changes get listed. You will find them in the 19c New Features Guide.
In this RU you will find only 1 new parameter:
The description says “Turn on/off dedicated optimization for DRCP” – and the default is “YES