What is the single Biggest Problem with D4?

For me pesonally, after lvl 70 doing the same thing over and over with barely any incentive. Sure “Uber Lilith” but that’s not fun either, nothing good drops from her. You get a cool title, who cares? If the devs said TODAY that if you are in WT4 and 85 or higher that the rare uniques now had a 5% chance of dropping I think it would make hitting 85 a lot more exciting. But we don’t even get that. There needs to be more to do (which I’m sure they will add soon if not down the line). People are getting way too upset that there isn’t enough to do this early on. If you haven’t even hit 100 yet, work towards that, then complain.