When is blueprint performance update coming?

A while back it was said that Blueprint is in the process of a major change to make it perform much closer to c++ code (not 10x slower).

How has performance changed in 4.11?

Are there some big changes around the corner, in 4.12 perhaps?

Here is the UE4 road map… You have most likely already reviewed, but… Maybe someone from staff will chime in with more details. There was also a recent twitch broadcast that talked a little about the future… Its toward the end of the video, but not very specific… Twitch