One thing that always annoyed me with BOBW was how Picard's borg appearance changed between part 1 and part 2. The eye piece is completely different. I liked the look from part 1 better. Going to be strange when they piece it together and suddenly he has a different piece of eye gear. lol
Do you mean his partially assimilated appearance in the cliffhanger and then fully assimilated in the battle to retrieve him? If so I think it was intentional.