The problem with those wait times is the stress, the idea SE has about making more difficult content is increasing stress on tanking duties, look at garuda ex, now we have to pull an add and the 1shooting plume with a knockbacking tornado in the way. while the DPS just have to move to a specified point on the battlefield.

The most difficult content for a DPS is titan, and it only requires to memorize his rotantion and a good connection.