That's definitely closer to what Wings fans would want. Personally, I don't think I do that just because I don't know what I've got in Sheahan yet. When your organization has few young centers, I think you've got to make sure you aren't giving up a potential difference maker. Especially when you aren't trading for a #1 and you aren't going for the cup this year.
I'm just not sold on the value of adding another offensive LD, either. Even if Edler played RD as a lefty, that would have more value. But a lefty LD offensive defenseman is like having two Kronwalls, and I'm not sure that's a match made in heaven for the Wings. Particularly as a long-term building block, because the Wings need an LD somewhere along the line to insulate Smith. Plus, having a top 4 consisting of Kronwall, Ericsson, Edler, and ____ (probably DeKeyser) means you probably end up throwing a lot of key defensive minutes to your third pairing, and I dunno if that's the best idea. That might mean you end up playing defense-only veterans on your bottom pairing, and the Wings really need to be playing kids there instead.
I think the reasonable setup for the Wings right now is:
Kronwall Ericsson
Defensive_LD DeKeyser OR DeKeyser Defensive_RD
Lashoff Smith
I think that would be a deceptively solid lineup. Lashoff and Smith have both taken the next step, and another defensive D creates a nice, balanced unit.