Thanks for the update. Glad to hear it's high on the priority list! I'm looking forward to the 1.7 update!
It may be worth having someone more official from the Flink team give an update on that ticket. It wasn't clear if the 1.7 comment from that user was just a reference to the fact that 1.6 had come out (or where they got that information). I know a few people have cited the ticket and concluded "not clear what's going on with Scala 2.12 support." If you have the bandwidth, a note from you or anyone else would be helpful!