You didn't miss anything, except for the team being a bit overloaded with work on 2.11.x etc. (We also had to unexpectedly invest in
new CI infrastructure because the servers at EPFL were beginning to melt under the load.)
More concretely, the work on the 2.12
features you're excited about isn't three months behind (and in fact, you can play with some of them in 2.11.x!). We're delaying the first 2.12 milestone until we've moved to the
new sbt build, because, for now, there's not much in 2.12.x that isn't also in 2.11.x.