By quoting the jumu'ah khutbah of Rasulullah (saw) it is not intended that people should start restricting themselves to the khutbah. The khutbah should be delivered occasionally as a source of barakah and with the intention of following the sunnah. It was the habit of Rasulullah that once all the people had gathered, he used to enter the mosque and make salaam to all those present. Hadrat Bilal radiallahu anhu used to call out the adhaan. On the completion of the adhaan, he used to immediately stand up and deliver his khutbah. Until the mimbar was not constructed, he used to take support from a staff. Occasionally, he used to place the staff against a pillar which was near the mihraab from where he used to deliver his khutbah, and then lean against it. After the construction of the mimbar, there is no evidence that he used to take support from a staff.
and Allah knows best