Now Cabon P2 profile contains all the information about the installed features in WSO2 Carbon. WSAS can be considered as Carbon plus set of carbon-components. These carbon-components can again be described as features. For an example service management feature.
All of the features for WSAS except for registry features are completed and available in carbon-features project (2.0.1 branch). Now you need to build carbon-features project before building WSAS.