These two items are probably aimed at filling gaps in Heirloom itemization that left people like Enhancement Shaman and Feral Druids without a swank weapon to level up with. Naturally, other classes can use these if they want, but those two class/spec combinations really had no good options to work with.
I'm particularly pleased to see the Mass of McGowan being brought back. I don't know if it was the same on all servers, but on my particular server, that thing was largely believed to be a myth for the longest time. You see, the Mass only drops off of mobs that are level 60 or higher. Before they finished implementing Silithus, there were no non-elite level 60 mobs out in the world that you would just kill at random throughout your day. The only place you could find this thing was usually in raids. I'm sure my server had plenty more of them, but the only one I was actively aware of was one being used by the main tank of a Horde raiding guild. It had more mystique surrounding it than most of today's epics.
They just don't make blues like that these days. Le sigh!
Gallery: Patch 3.2 Heirlooms