Just think Romanov will make a difference in a heavy slugging playoff series one day. Kid blocks shot and should make it hard. Bolduc does look good but has had some injury issues even going back to junior days unless i'm mistaken.
Romanov is under control at a reasonable rate - he's going nowhere whether he ultimately ends up a 3rd pair D instead of a 2nd pair. I think NYI need to do whatever it takes to make Bolduc a regular roster D. When you add looking the part (really playing competently) to his size, athleticism, and endurance, there's only upside.
I also think Mayfield will go (unless NYI play badly before the deadline, I think he walks in FA), as I think NYI will hope to extend Varlamov at a lower rate. The only problem with that is that I Varlamov might want to be closer to home (which, as I understand it, is Texas, not Russia).
Replacing a bottom pair RD while being close to the cap is a normal problem for good NHL franchises, and it's not something to worry about right now. The worry imo for NYI in the near future is still on the wing, and that's even if Barzal transitions to beinga top-line winger. It's probably the easiest position to reload with draft picks, but oh well.
Chychrun, imo, is beyond a pipe dream. I would love NYI not to be the only NY metro area team without a Jewish star player (like Fox & Hughes), but oh well.