Trying "to entertain" is what got Di Matteo in trouble. The manager's job is to produce a winning side. Rafa is in the top 5 managers in terms of winning percentages. Besides some of us are more entertained by a powerful, well organised side shifting from defence to attack quickly than one which flatters to deceive by pouring into attack helter skelter and giving away goals at the back. Mourinho ground out a lot of one goal victories with a strong defence.. Rafa's side scored more goals at LFC and Valencia than ever before in those clubs history. So, to answer your question - no you cannot expect to see a mid-table negative side. You can expect to see a powerful winning side once the Chelsea players get themselves comfortable with a faster-paced attack and a consistent defence.