I agree with your first point... Luchesse puppeteered that powerplay along with Gambino who outlived Tommy and reaped the rewards.

your second point.... are you insinuating that after exile from NY, Bonanno was still a go-between for the drugs? and Dellacroce (who probably wasn't apart of the cherry hill clique, when it comes to the drugs) or whomever, thought it would be easier to eliminate Galante and go to the original source?

You made a connection, I've never really thought about, how Galante gets whacked and several years later Gotti's crew (Dellacroce underlings) get drug indictments.