This.
ROR
Stepan
Brassard
Moore/Boyle
First of all, swapping Stepan for ROR is a clear-cut upgrade.
Secondly, you instead want to deplete our defensive depth to acquire ROR?
I assume you're trading Marc Staal for him then?
Then the same argument you're trying to make for offensive depth can be made for the blue line.
McDonagh-Girardi
Moore-Stralman (IF he re-signs here)
_____-Klein
The thing is, we don't lose any depth by replacing Stepan for O'Reilly. O'Reilly literally replaces Stepan, both in his role and in his spot in the lineup. There's no depth lost. It's simply upgrading the position by taking advantage of Colorado being in a ****** situation.
If you trade Staal for him, yes our center depth improves because everyone gets bumped down a line, but you have no replacement for Staal and everyone on the back-end gets bumped UP a pairing and playing above their abilities.
This is all not to mention that Stralman isn't re-signed yet, as well as the fact that Stralman's solid play was at least
in-part due to the stable and solid defensive play of Marc Staal next to him. Stralman playing next to John Moore might not look like the same Anton Stralman, and John Moore's warts may show more as well. It's a dangerous game to be messing with a top-4 that's been so successful and is so familiar with each other. McDonagh and Girardi. Staal and Stralman.
That top-4 should not be messed with, imo. Trading Klein along with Stepan to acquire ROR who replaces and upgrades Stepan improves the team without upsetting that crucial top-4 on the back end. Klein is easily replaced. Staal and the minutes and situations he plays in is not.
Just think about this:
If McDonagh gets hurt for a couple months, do you want John Moore to be your first-pairing defenseman in his absence? Or do you want Marc Staal (who used to play in that exact #1 LD spot) playing there? That's what depth is all about.