This update does a lot of interesting things, the nightmare chambers are a really nice mechanic and same can be said for progressing through the tower with a group. They key phrase being with a group.
Sadly while the nightmare chambers are great mechanically they are also the biggest flaw because when they mix with everyone’s favorite overflows going into one of these mini instances with or without a group causes you to loose the bigger group you were climbing the tower with. Now this is not all bad because it functions as an anti-zerg mechanism during the peak times. However, it also can throw you in an instance of your floor that is barren and climbing solo can be really frustrating when you hit a champion event that you can’t complete to progress (and since those events can not be ignored because of the barriers…).
TL;DR: The tower is a great mix of open world group content and instanced content that can be done in a group or solo (usually). Sadly some of the game systems can cause unlucky players to have a really bad experience because of getting separated from your open world group and not being guaranteed to find a new one.
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