The mission statement of the Holy Prophet (S) was that he had come to perfect the distinction of our Akhlaq. So all that he taught (Aqaid and Fiqh) would lead to good, no perfect Akhlaq.
Akhlaq is the fruit of the tree of Islam whilst the Aqaid are the roots and the Fiqh the branches. Without fruit the tree hasn't fulfilled is purpose. And in the same way without good Akhlaq we haven't really followed the Holy Prophet (S).