Valid questions. I don't think that's how the team looks come the season opener, it's just a scenario I threw out and I agree with your questions, they're the right things to be asking.
I still think DZ goes at the draft for a top-6 winger, so that bumps Kreider. However, I do think in a new system Kreider will absolutely excel. Torts was trying to make him Hagelin. Kreider is not Hagelin. Their only similarity is their speed, that's it.
Lindberg has been playing in a men's league since 09-10. If he comes to NA, which it is believed he will AFAIK, I think he will absolutely impress. His faceoff skill and two-way play alone might get him a shot to open the season on the Rangers third line. Of course this is a very optimistic view though.
I do think though that you would be hardpressed to find any team out there without a single concern.