Anyone else think they should at least Specify the # of New Jobs?

[Ladon]

Whatever they add, they better redesign the game to better support actually being able to play on multiple jobs with all of these new ones coming in. I'd rather not have to keep using only my 'main job' for locked out content.

Since the expansion involves Ishgard, the dark knight makes sense for launch, samurai won't be around til we get more content involving Doma, which didn't seem to be mentioned in the notes for 3.0.
Remember that Ninja and Rogue had precedent before they were added. So far there's been no precedent for samurai, but there HAS been precedent for Dark Knight (not an actual NPC, but there are thematic elements at work with Ishgard)
Therefore, my prediction is we will NOT be receiving Samurai for 3.0

Actually now that you mention this, I think some of the story in the 2.3 questline is pointing at the imminent emergence of Dark Knights in Ishgard.