Re: I am taking command of the fleet.
Perhaps Picard is the longest-serving officer holding the rank of Captain, so has seniority? (If Morgan Bateman was indeed there I wonder how his seniority was calculated! And whether he received 78 years of back-pay).
If seniority was a factor, Ransom should've held rank over Janeway by that logic. He certainly looked older than her.
"I was never a Star Trek fan." J.J. Abrams