I don't know when the last time you looked at a Magelo profile was, but these days, the top raiding CASTER (a mage in Crimson Tempest) has over 44,000hp unbuffed and 5452 AA points, so an additional 800 with the new expansion is not that extreme. 450 spells, however...well, I guess if they give each class that can cast spells five per level and another eight at 90, that might do it. I don't know.
It's still nuts though, I'll agree. At this point, every piece of gear has >1300hp/mana on it (with augments) and unbuffed stats sit around 650-800.
Edit: For instance, here is a monk earring
http://eq.magelo.com/item/111603