World of Warcraft Over Time - Video from youtube.

This is definitely a good video to listen to. There're many interesting points raised throughout it and some personal opinions which are very well explained.

Unlike many other videos I've seen around, he manages to explain clearly what does he like/not like about WoW in a clear manner.

Regarding hard modes in Ulduar, the developers have mentioned in the past they felt the game was too obscure in how some things were toggled. Sometimes you would only know how to checking achievements (Hodir comes to mind)... so that's something to keep in mind to understand why some things are the way they are. It's also kinda counterintuitive (in my opinion) to have to stop DPS on the heart on XT because you don't want to trigger the HM, or wait on Thorim's tunnel because Sif is still there.

Or even avoid potential griefing (someone disgruntled pressing Mimiron's button over and over, or sending down guardians to make Yogg-Saron easier).