But I guess it should exist an update for AC v7.0 ? Please confirm it.
Moreover, I would know if there are improvements of webApp, reports and also the Survey module for AC v7.0 ?
There are more recent versions of the JSAPI document. They are shared on the download center of the support portal. If you don't see them you can ask support. I believe the latest version is from February 2017 and would work for both v6.1 and v7.
If you are already on the latest build, you will see no difference between v6.1 and v7 for the features you mentioned (appart from new icons)
I didn't know the 8857 build, I wonder if it exists only for AC v7.0 or also for AC v6.1.1.
It is not mentioned in the v7.0 RN page as well: Adobe Campaign Release Notes As I am in AC v6.1.1 build 8853 and I face with an important AC bug (mtachild process issue with an infinite loop) and I am waiting for an hotfix, I am going to contact support again...