TWW Beta.....the Rookery dungeon

I got curious and took a 71/480 demo Lock in last evening just to see what it looked like.
Is the beta THAT pathetically unbalanced…or is it designed to be soloed? lol.
I managed to get far enough to solo the second boss… Stormguard Gorren. After that I stopped because I dont want to ruin the content for myself like I did in DF beta.

Most of the trash was sickly easy for just me being in there.
A couple of the bigger ones put up a fight so I had to self heal, but Id expect that if the games going to be challenging.

Is the Rookery supposed to be soloable?