The sooner they get these birds the better. LY with a complete renewed fleet with a real business class and a reasonable dispatch reliability would be a huge improvement.
As for the -8's, I don't think Boeing WANTS to sell them, they make much more money from the 9 and they are assembled on the same line, so they're not idling anything. I don't know if Boeing still has the early build ones that they're trying to get rid of that's a different story.