What I like about our d prospects (and Romanov) right now is we have a nice mix of safe guys and home run swings.
Romanov and Ghule imo are safe bets to become atleast second pairing guys with more upside.
Struble is almost a sure bet to be a bottom pairing/ahl tweener at worst (injuries allowing)
Then we have players like:
Norlinder, Brook, Mailloux, Harris, Kostenko who have the offensive tools to be good top pairing guys but also could become career KHL/AHL ers or Erik Gustafsson types.
Basically I like the mix of safe guys and homerun swings.