The lack of trials/arrests is more likely to be evidence of "not doing anything" than evidence of anything else. I'm not sure why you're citing it as evidence of strength.

The only thing that I can perceive that the Outfit has over the other small families is that its members seem to have more impressive legitimate business portfolios than the guys in NE and Philly. I don't really see any evidence for superiority in any other respect. But investing criminal proceeds into legitimate businesses and then assimilating into the mainstream of American society and keeping your kids out of the rackets is what kills off mob families - that phenomenon is just as lethal to the mob as RICO in my opinion.