Correct. The Outfit reorganized their West Coast Operations after Spilotro. Basically, guys that could be trusted were reorganized, others voluntarily left organized crime and others were bounced out by Chicago.
After 1986, the major players on the West Coast (LA, Las Vegas, Phoenix) were:
Frank Buccieri
Don Angelini
Michael Carraci
Dominic Cortese
Joseph Hanson
Chris Petti
Paul Schiro
Vito Spillone
Herbie Blitzstein
Rocco Lombardo (debateable)
Several of these individuals had little crews of associates, of which apparently the DiNunzio brothers were part of. Herbie was in jail until the mid 1990s. Angelini, Caracci and I think Petti went to jail with DiFronzo over the attempted takeover at Harrah's Rincon.
Many of the Las Vegas local guys loyal to Spilotro were considered untrustworthy and thus shelved. These included John Brancato and several members of his Hole in the Wall gang, in addition to more minor players.