Content should be challenging to execute... Not challenging to learn

[Dualblade]

snip

Alexander Normal is also easier then Coil, the people who cleared it quickly also probably have cleared Coil multiple times, and pretty much are better then most of the player base. Meanwhile there are people who are stuck on the first floor not able to do certain mechanics correctly.

Alexander Savage will be the challenge for even the coil people, so long as the devs have been truthful/are right about player skill levels. And even then expect atleast one group to beat it in less time then they thought.

Also at times the challenge isn't the mechanics themselves so much as having to pay attention to multiple ones at once. Those DKs are so easy...but you let yourself tunnel vision just a little on dps, or healing or dodging that one AoE, you just might miss it.