I know the team at ZoS is looking into the delay issues, but just wanted to give a head's up about Rivenspire.

After the area loads (which seems to take longer than most with the delay), the lag makes the area pretty much impossible to play.
Spells lag/break/don't cast
Enemies aren't dropping despite low/no health
Screen stuttering
Getting kicked out changing zones (such as going into a delve)
Even the soundtrack is breaking up.

I know there's a forthcoming patch, so I'll play other areas until it's released.

Hope this info helps and have a great day!