Expansions of years past were also much larger. It took a lot more time to complete them. Recent expansions are tiny. There is no excuse for people not completing levels and AA plus getting gear in a year's time with current expansions. My (raid) main was maxed out within a week of RoS launching and my group geared boxes were nearly fully geared in that time along with levels and AA. Yes, that's not typical, but spread it out for the full year, and you should expect the more casual to complete those levels and AA while picking up gear along the way. If you're so casual that you couldn't compete that in a year, then you're likely not the type that really needs to be in the latest expansion either. There has to be some minimal level of expectations for designing content.