I spent about 10 years as an Oracle DBA (back around Oracle 7 and 8) and the last 20 or so years doing PostgreSQL.
My initial impressions were that Oracle did a better job providing tools and options that users and DBAs need and PostgreSQL was pretty much roll-your-own.
Things like being able to copy tables from one database to another or to restore the dump of a table to another table name in the same database are things that would make a DBA's life a lot easier.
I worked on a general-purpose web-based tool that could read the PostgreSQL table structures and provide a form for querying and updating most field types in a table, but never really took it beyond the persona use basis. Now that I'm retired, maybe I"ll work on this again.
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Mike Nolan