AOKP builds for marshmallow are being available slowly for many devices here
This is like pre-alpha level. We are porting and developing a lot of features. Our review at gerrit.aokp.co is very active.
Anyone wants to directly communicate to AOKP team about features - any suggestions and feedback is welcome - please use this thread.
We will try to keep an eye on this thread and respond as much as it is possible for us.