No. Completely wrong.
The President of the United States is being investigated for obstruction of justice resulting from the firing of an FBI director. In addition to the allegations against the President, there are counter-charges of misconduct, and politically motivated behavior, and general corruption within the FBI. To bring in a former FBI Director whose entire career and identity and allegiance is to the FBI is absolutely the wrong thing to do.
Further, the primary witness or accuser in the obstruction of justice case is James Comey, a former director of the FBI. Bothe Mueller and Comey have publicly acknowledged- and it is well known- that they had a mentor-mentee relationship. Comey was unceremoniously fired, and has fallen from grace and desperately wants to even the score in the form of having a special counselor appointed. He has even admitted to leaking documents and information for the purpose of getting a special counselor appointed. To have his mentor appointed as the special investigator is a bias beyond comprehension.
In addition, the special counsel act or the justice department rules for appointing a special counsel specifically state that the special counsel shall not have an established relationship with any of the key witnesses- e.g. comey as the key witness in the obstruction of justice charge.
Your comment that "the fact of the matter is that you will not find a better prosecutor to head the investigation than Mueller" is out of order. It would absolutely be very easy to find a better special counsel. He is not only not fully qualified, he is absolutely disqualified.