There is no setting to revert back to the very reliable and high quality "AI" autocomplete that reliably did not recommend class methods that do not exist and reliably figured out the pattern I was writing 20 lines of without randomly suggesting 100 lines of new code that only disrupts my view of the code I am trying to work on.
I even clicked the "Don't do multiline suggestions" checkbox because the above was so absurdly anti-productive, but it was ignored
I found that it makes the AI experience so much better.