I already blogged about it: KWin Scripting needs help from the community if it should be available in 4.8. Unfortunately nothing changed about the state, except that I added a build flag to not compile Scripting.
I just wanted to apply a patch and got a compile error because of scripting and I remember that my GSoC student had also problems with scripting during his project.
So this is the second strike for scripting. And you know what will happen when I have to proceed to the third strike 🙁 Step up now, or scripting will have to go.