I would tend to disagree with this. Generally, Star Trek crews do tend to make the choice to follow their Captains or fellow Starfleet officers into danger. For this reason, most of the bridge crew sticking with Michael seemed fairly in-character for what we know of Starfleet. We see Kirk's whole crew throw their careers away in Star Trek III for the outside change of rescuing Spock (Just because they were exonerated later, doesn't mean they didn't think that their careers would be finished), Picard's crew follows him in Insurrection, and there are a number of television episodes and movies where the Captain says something along the lines of "I can't order you to do this" or "This directly violates your orders" to which a character says "I believe I speak for everyone when I say "To hell with our orders..."
As for Tyler, he is a Tyler/Klingon hybrid, so I can imagine him staying to clean up the mess that is Section 31. He has also left Michael for the sake of duty before, so I didn't feel that this was a change to his character.
While the story is leading to a conclusion (since next week is the finale), the story grew quite organically for me.
