These are all good points. We need to keep in mind, though, that Scala is actively changing, and creating great tools and rich enterprise-grade integrations takes both time and money — resources which are quite scarce :)
As for tooling, there’s an ongoing initiative led by the Scala Center to improve their state — let’s see in a couple of months where they arrive at. Also, IntelliJ is improving with every release.
The enterprise part — I think currently Akka/Play/Alpakka are the answer, but there’s still some missing pieces. Still work to be done! :)