I don't mind the concept of a bridge to 8472, but it REALLY bugs me how they made that happen in the course of a single episode. If instead 8472 made sporadic appearance through the second half of Voyager as antagonists, and then, in the mid- to late final season, they FINALLY, after many attempts, manage to make a connection to them and find a way to make peace, yeah, that'd have been fine. But having their final appearance come in the fifth season and making them 'just misunderstood' in the course of a single episode, after they were introduced with the catchphrase 'the weak shall perish' was just disappointing.