The old style seems like it would weaken the case for mass roundups
Well, you asked, so I'll tell you. It was a different time. What you say may have had merit 50 or 60 years ago. But since the RICO and electronic surveillance age? Nah.
Joe Bonanno had a single book ghost written for him that led to the indictment of almost every boss on the street. And with all the rats today? One wire at a commission meeting would lead to a 300 person roundup with about 500 counts of racketeering attached.
The Commission wouldn't work today for that very reason. Two bosses having a cup of coffee together would have every branch of Federal Law Enforcement, from the FBI to Homeland to ATF, foaming at the mouth. Things change.