Personally, First Contact weakened the Borg. Introducing a queen completely takes away their uniqueness and the horror. Before they were an unstoppable force. But with a queen, you knock her out, and you defeat the Borg. Plus, if there was a queen all along, then how did the cube in BOBW fall for the sleep command? It wouldn't work.
All Voyager did was run them into the ground. The damage was already done.