#2 The treatment of women
This isn't an exact storyline, as for pretty much the entire Attitude Era (and for a good while after), women weren't exactly treated with much dignity. Seen as little more than eye candy, matches between females were often seen as bathroom breaks by the best and fans, and perverse entertainment by the worst.
The WWF didn't exactly push their women as athletes (with the odd exception, e.g. Chyna), as matches would often be contested in all manner of fluids, from gravy to mud to chocolate pudding.
Contrast that to today, when women are not only seen as equal to men, but too many fans, have better storylines than their male counterparts.
Whether it be Triple H drugging Stephanie, or the Dudleys slamming Mae Young through a table, this stuff simply would never fly today.