At least he netted something for Halak, even if it was to a division rival.
Those FA signings were extremely aggressive. D is our only area of strength to trade from, and I get the impression he WANTS the depth and won't trade any of the D - so it's more about how highly he values D. Unless the organization has soured on Alzner or is finally ready to trade Green, I don't see any moves happening at D.
Those FA signings handicapped us in relation to the cap, so we'd need to shed salary in any trade, and that will make us less appealing trade partners to other teams.
We might be able to net a center from a D trade, but probably not a goalie unless we add value (good picks or prospects). Suddenly, being aggressive doesn't sound too appealing.