This aug lacks stats like Attack, HP Regen, Mana Regeneration, Clairvoyance, Spell Damage, Heal Amount, Endurance Regeneration, etc. Adding some of those stats would make a nice item from the tower even for raiders.
You don't have to use it. 1500 hps is nothing to sneeze at. Personally, I'd rather have the counting stats to all heroics than any of the mod2 stuff. Heroic Charisma is where it's at these days. BTW, nice try with slipping Endurance Regeneration in the list of lacking stats ... someone would be proud.
Still I would suspect the reason they stats are missing is they were rushed adding the content. Well that is my guess based on no information
sadly none of that matters. clairvoyance has a 99% chance to not work, and spell damage is kinda like hstr. It makes you feel better even if it doesn't matter much