Are you looking for a quick list of new features for December 19.12 ?
SummaryRead about new features
In Summary these new features were added in 19.12
E-Business Suite General Ledger Application Type - A new E-Business Suite General Ledger application type is available to manage segment values and hierarchies for GL charts of accounts in Enterprise Data Management Cloud.
Access to Children and Ancestors in Expressions - You can access child and ancestor nodes in an expression to evaluate their data for derived properties, property transformations, and custom validations.
Copy and Paste Expression Terms - You can copy and paste expression terms within the same expression in the Expression Builder. This enables terms to be moved and reorganized as expressions are defined and altered.