The Val'Sharah Invasion Scenario is significantly more difficult and obnoxious than any other invasion scenario

There seems to be far more mobs and they seem to respawn quicker in this scenario. It should be fairly telling when the most commonly used strategy is just to run to the pylons and try to disable them before you die. Not to mention Wrath Lord akrazar at the top of the tower actually has kill pressure if you don't do his mechanics correctly. Every other invasion scenario seems trivial compared to this one.