More proof that Janeway just didn't really care about dead people. All the people dead and gone because of HER actions, and she suddenly cares about Seven and Chakotay? Naw, she's lying to us, right to our faces. The real reason for picking that time and place to go back in time is because they are right next to a transwarp hub, and that's just the macguffin she needs to magick everyone back to the Alpha Quadrant. It's just a bonus that Chakotay and Seven haven't taken a dirt nap by this point in time, and it's mere coincidence that Neelix is happy on his Talaxian harem colony.