No he wasn't. Arcadi wasn't kicking up to anyone, let alone NY. Before Vito went to prison he severed ALL ties with the Bonannos and built his family as an independent one.
Not to mention the very small, minor detail that there's no way in Hell that the other American families would allow them to have a Canadian boss. Every crime becomes International, Interpol gets involved, and it attracts heat to people who don't need the aggravation. Besides, the Rizzuto/Bonanno relationship was over
BEFORE Vito died. No one shed a tear in New York when Montagna got an early Thanksgiving present, which speaks volumes. Talk about a sacrificial lamb (which is ironically an Easter dinner
).
They can pick up the pieces if they keep doing what they're doing: Look to the old timers for leadership, and keep the lion's share of the activity out of the Bronx (where they were always a distant fourth to begin with).