Is there some kind of "backlog" of Scala's design issues or mistakes, which are planned/not planned to be solved in a future release?
I know that there is Trac and the SID process, but in both cases you only see the changes after they have been made.
Maybe I miss some existing infrastructure where language/specification changes can be collected and discussed?
We "paid" most accumulated technical debt in 2.8. We maintain no list of design mistakes that are scheduled for changing now or in the future. In fact I think we'll see a pretty stable phase for the next years where most energy will be spent on getting great APIs and libraries and figuring out the parallelism challenge.