Funnily enough, Brad did come back to SOE after they bought VSoH, to work on the EQ expansion Call of the Forsaken. Steve Clover also returned to SOE, and then fucked off with Brad to make Pan'theon. Bill Trost went on to have a career helping make successful MMOs like Defiance, New World, and Ashes of Creation.
The uncomfortable truth here is: the IP has been mismanaged from the start, and you can lay most of the blame on John Smedley. SOE back in the day thought that EQ was lightning in a bottle, so they tried to diversify and catch another lightning. That is how you got things like Free Realms ... which, totally would've worked, if it was just more like Roblox.
The money EQ made wasn't spent on EQ, technical debt was never worked on as expanions had to roll in on a timely manner, and the money it made went out the window trying to make the next big thing. This was very evident when Luclin launched, and how you got the "you have 14 days" post: Vex Thal wasn't finished when the expansion launched, masked by a tedius keying process, and Emperor Ssraeshza (who you needed for the key) being unfinished as well. Hell, the designer of Acrylia Caverns quit the company and the inner zone never got finished.
tl;dr: yeah, it's a miusmanaged IP, but the people that created it also fucked it up hard, sending it on that trajectory. Remember: Brad left AFTER Luclin.