Instance patch notes that I'm afraid we'll see soon

Ahn'kahet: The Old Kingdom
- Elder Nadox will only summon one Ahn'kahar Guardian per fight, so you won't have to waste as much time fighting things that aren't the boss.
- Prince Taldaram won't vanish anymore, so you can keep dpsing him throughout the whole fight.
- Jedoga Shadowseeker will only try to make one initiate ascend per fight, so you won't have to waste as much time fighting things that aren't the boss.
- Herald Volazj will only cast insanity once, even on heroic, so you won't have to waste as much time fighting things that aren't the boss.
- Amanitar, that boss that everyone skips, has moved out of his cave and is now conveniently located in a corner of Volazj' room for easier emblem access.

Azjol-Nerub
- The number of mobs that spawn to attack Hadronox has been greatly reduced and he will move to the surface much more quickly to reduce wait times.
- Anub'arak will only burrow once per fight, so you won't have to waste as much time fighting things that aren't the boss.

Drak'tharon Keep
- Novos the Summoner will now call for all four of his Crystal Handlers at once so you can AoE them down quickly and won't have to waste as much time fighting things that aren't the boss.

Halls of Stone
- The Tribunal of Ages encounter has been sped up significantly to allow players to make better use of their AoE abilities and to make sure nobody has to spend too much time just standing around and listening to RP crap.

The Culling of Stratholme
- The Arthas event will be set in motion as soon as the first person enters the instance and the first wave of undead will spawn right away, so you can start clearing as soon as you reach Stratholme. Once Arthas has finished talking and you've killed Salramm the Fleshcrafter, Arthas will catch up with the party and put himself on /follow on the designated tank for the rest of the instance. Infinite dragonflight mobs will spawn much more quickly and without any dialogue, so you don't have to waste any time standing around and listening to RP crap.

The Nexus
- Anomalus will now only use his charge rift ability once per fight, so you don't have to waste as much time fighting things that aren't the boss.

The Oculus
- The annoying trash at the entrance to the instance has been removed.
- Varos Cloudstrider has dropped his protective bubble and can now be engaged as soon as Drakos the Interrogator has been killed.
- Mage-Lord Urom awaits challengers in the centre ring right from the start.
- The cache of Eregos now also has a chance of dropping a pony.

The Violet Hold
- Ichoron will only pop his bubble once per fight, so you only have to use a crystal activator to one-shot all the adds once.

Trial of the Champion
- Instead of flying down on his skeletal gryphon and making a speech, the Black Knight will now just drop down from the ceiling, yell and immediately initiate combat, so you don't have to waste any time standing around and listening to RP crap.

Utgarde Keep
- Annhylde the Caller will now resurrect Ingvar the Plunderer instantly, so you don't have to waste any time standing around and listening to RP crap.

Utgarde Pinnacle
- Svala Sorrowgrave will await adventurers in her Val'kyr form right away, so people don't feel pressured into skipping her because waiting for her dialogue with the Lich King to finish wastes too much time.
- The device that unfreezes Gortok Palehoof and the other monsters in his room will now activate instantly after clicking. Also, all the mini-bosses will come alive at once so you can just AoE them down instead of tediously having to fight one after the other.
- Skadi the Ruthless can now be shot down with a single harpoon, so you won't have to waste as much time fighting things that aren't the boss.
- King Ymiron's screams of the dead won't stun anymore, but will instead apply a minor damage reduction debuff. We agree that being forced into a whole eight seconds of inactivity repeatedly is no fun at all!

I wish this post was pure satire, but apparently some of the changes mentioned here are already in the works, according to Wild Growth. Why is it so terrible for instances to engage people in other ways than quickly killing a bunch of bosses for their emblems?