I copied the plugins from vc150 to vc160 as directed and audio work fine in the editor. However, building a cooked WindowsClient build :
LogAkPluginActivator: Display: AkPluginActivator parameters: Client -run=AkPluginActivator -platform=Win64 -configuration=Profile -targetconfig=Development
LogAkPluginActivator: Display: Can't find plugin list for <Windows> platform
This results in no plugins being loaded on the client.