I really love all the improvements in the database plugin in 13.1 EAP.
There is one more improvement I would like to see, however: Error feedback when a package fails to compile in Oracle.
If I run a create or alter package script, I get no feedback if compiling that package fails (because there's a syntax error, or a missing dependent package)
I then need to switch to SQL Developer to recompile the package and see what the error was.
If I was able to get package compilation errors in IntelliJ, I can ditch SQL Developer for good! :D