* Brell Serilis Underground Layer
* 12-15 zones.. and bonus content to launch later in April
* achievement tracking.. to track progression (more intuitive progression tracking)
* twice as many weapons as any expansions
* focused targeting window.. so you can monitor health of friend or foe..
As far as more levels:
No. There is no level increase for EverQuest: Underfoot. - Elidroth Renato (Doug Cronkhite, Game Designer, Sony Online Entertainment, LLC)