I think that Greenway can have an effect on the game like a player like Tom Wilson does. They might not be pretty, but can be very effective.
What this team is missing( and it's kind of a " Duh!"), is forwards who can handle the puck, and are comfortable in scoring situations. You don't need a ton of those players, but a good team should have at least 4-5. We have Kaprizov, Fiala at times.
Both Boldy and Rossi look to be the sort of prospects that are comfortable handling the puck, but it remains to be seen if they can bring that skill with them to the NHL. If they can, then we are in decent shape. If not, then things get pretty depressing.
I look at a team like TBL, and marvel at how they make overlooked, ordinary prospects look like top 6 players. Wish I knew how they do it.