Don't think there is really an issue with what Gallant is doing on day 1 of camp. There is a clear cut top 9 forwards on the roster.
Mika, Kreider, Panarin, Trocheck, Chytil, Lafreniere, Kakko, Blais and Goodrow. Guys like Kravtsov, Gauthier, Hunt, Othmann, Cuylle, Vesey, etc. are vying for the last few spots. Reaves has a spot. Carpenter has a spot (PK forward). Reaves and Carpenter have roster spots, maybe not lineup spots. I could see them interchange. Also, guys like Blais and Goodrow could find themselves on the 4th line, it's just that right now, their part of that group the coach trusts.
Goodrow being ramped up slowly is fine, and it allows Blais to fill in a role. Plus, you will get to find out exactly where Blais is since he hasn't played in 10 months. Who better to put a guy that you want to see if he can do what you need than Kreider and Zibanejad? They're the vets up front. Could it have been Panarin? Sure, but he is also working with a new center and Trocheck fills the gritty type on that line, put the skilled winger with them now.
Kravtsov really has his chance to shine. He's never really been put high up in the lineup. This is the final opportunity for him here. He has to work with Panarin. If he cannot play his skill game with the most skilled player on the team, I'm not sure it will work. He is the one out of the group vying for the last spots that could vault himself into the Top 9 forwards on the team.
As for the Kid Line, let them come back comfortable. That line was the line they all had their most success in the NHL with.
As for Hajek over Jones with Schneider, I think if we're honest with each other, Hajek took one for the team last year. He sat in the pressbox all season. We all joke, but it's a tough spot. Easily could have requested a trade. He should be given the benefit of the doubt to begin camp. There is no way he wins the 6th spot. Jones will take it. Maybe Robertson takes it from both of them. You still have to let the guy that was on the roster all last year be the leader and let Jones/Robertson "earn" that spot.