I agree Spurgeon is currently a cap dump (due to injury). It's for the 25-26 season, so a decent/healthy year and with some retention ($2m?) he'll be tradeable. The earliest I think he could have positive trade value is the TDL next year.
The d-corps this year has already outproduced last year.
23-24: 97p (5v5), 135p (total). pace of 116p (5v5) and 162p (total)
22-23: 86p (5v5), 133p (total)
For comparison; the FWDs last year had 500p (total), this year they are at 430p (total), 518p (pace).
I don't see the overall d-man points changing much with Spurgeon in the lineup. The distribution of points between the d-men would change, but the overall total I think would be pretty much the same.