What I take from that measuring system is that Abyss is just too hard for most people. It's saying that to beat a level 90 domain, with a timer of 10 minutes, you need level 90 characters/weapons and fully levelled talents etc. That's fine. But Abyss is a 3 minute timer (well, over two floors it's 90 seconds each), with monsters at 10 levels higher who regularly have invulnerability phases, go invisible, disappear under the floor, teleport to the other side.....*however* the game does not allow you to level anything past lv 90. Do skill issues alone make up for this?

I think Reddit/Youtube etc. skew the perception that Abyss is easy. It's not, IMO.