In a vacuum, I don't think it's a bad line, but when you look at the rest of the team, I think there are better fits for Eriksson. I really want to see him playing in the top six, at least to start, as I think he is one of your more talented forwards, and should be playing with other guys of equal talent. That's not to say that line wouldn't work, or that it wouldn't be an option if Claude shuffled the lines at some point during the season, but I would be surprised if Eriksson started on the third line.
I don't project Paille to start on that third line, but I wouldn't be surprised if he made his way up there at some point. I didn't think he would be a viable solution to the third line last year, then he proved me wrong. He really had a great season, and showed some more finish than usual. If you go based on hard work and merit, then Paille has a great argument to get some time on that line. The issue is that you then break up the very effective Merlot line, but we'll see.
I would really love to see Spooner centering the third line, especially if he is centering Soderberg, and one of Smith/Fraser/Knight. Those guys are all shooters, and they would benefit from a playmaking center, which Kelly is not. Not to say Kelly can't have a bounce-back season, but even at his best, he was never a playmaker. That would leave Kelly to mix in on the fourth line, maybe spelling Thornton on wing some nights, or filling in at other spots on the roster in case of injuries/ineffectiveness. I'm just not convinced that Claude will go with a third line that is so inexperienced, especially at the center position.