I get what you mean, but I thought the previous dlc energy weapon, the Holorifle, had pretty much covereded the needs of an energy user: very high damage, low ammo consumption, able to snipe with it, a DOT doing 15 dmg over time... I do recon that the unbreakable glicht did also play a part for it, allowing you to use max charge ammo at free will.
Even if HH didn't bring a real enegy weapon for us, the energy users, we can expect to have a fairly good chance to get some really got weapons in Old World Blues.
But since we are talking about dlcs, I know loot is a very good incentive to get them ( I am that kind of buyer) but I didn't really cared for HH, to be honest, the loot was really secondary for me in this dlc, the region, on the other side, was great.
Also...
We also added a new recipe in HH to convert Fission Batteries to Energy Cells.
I think it's a greay thing for EW users, a bit of a gimmic, but useful nontheless.