This question assumes that the purpose of chazarat hashatz is to allow for those who were unable to say their own shmoneah esrei (assumedly due to Hebrew illiteracy) to fulfill their obligation to pray.
To make a broad and unsubstantiated generalization; in most orthodox minyanim all the people praying know how to read Hebrew and have access to a siddur. If that is the case why do they need to have the chazan repeat the shmoneah esrei?
Lest you counter with "we are concerned for the minority of minyanim where that is not the case" I would refine my question to "if all persons praying are Hebrew literate and have siddurim, may they choose to refrain from the repetition of shmoneah esrei?".
Furthermore I would also contend that many, if not most, minyanim the congregants are not properly following along during the repetition and are failing to answer amen which causes problems of a bracha l'vatalah. So, perhaps removing the repetition would be in order.