Let me preface this by saying I've been a full time Scala dev for a few years now, and routinely make the choice to use Scala in new projects.
That said, the complaints about Scala's complexity are not overblown in the least. If you ever had the opportunity to move from one Scala team to another, or to integrate 2 Scala teams that had grown independently previously, you see that even saying you are a Scala team does not narrow down significantly what to expect when opening up the code base. There is so much variance in what is and is not idiomatic Scala, that even the Scala standard libraries are a mix of styles and best practices. As for Scala steering you towards the "Right Thing", I'd argue that the Scala community has not settled on what that is (to the point of schism) and my experience indicates that quite the opposite is true.
As far as IDEA achieving parity with Java, the very concept is laughable. Simple things like safe refactorings aren't, and syntax highlighting mistakes and phantom compile errors are common. While the IDE story in Scala has improved dramatically over the years, to say it is Java level is over selling it.
That said, the complaints about Scala's complexity are not overblown in the least. If you ever had the opportunity to move from one Scala team to another, or to integrate 2 Scala teams that had grown independently previously, you see that even saying you are a Scala team does not narrow down significantly what to expect when opening up the code base. There is so much variance in what is and is not idiomatic Scala, that even the Scala standard libraries are a mix of styles and best practices. As for Scala steering you towards the "Right Thing", I'd argue that the Scala community has not settled on what that is (to the point of schism) and my experience indicates that quite the opposite is true.
As far as IDEA achieving parity with Java, the very concept is laughable. Simple things like safe refactorings aren't, and syntax highlighting mistakes and phantom compile errors are common. While the IDE story in Scala has improved dramatically over the years, to say it is Java level is over selling it.