Not all features are completed at this point of time. These are some things, which are incomplete rather than absent. In current implementation there are enough hooks to plug these features.
As of now, thread pools cannot change the size on the fly.
Resource pool and IO pools are not implemented as of now.
The product needs a logging framework, which is thread-safe. This will help developers debug their problems easily. Otherwise detecting problems with threaded server is not always a straightforward task.
Component management is limited to instantiating an application object from a shared library. However there are more features required in order to get a feature complete implementation of components.