But, I do agree that there could always be more fun mechanics. There is always room for more. However, not the simplicity that was Kara. Something actually complex and engaging. I would love to see more raid encounters where people have more roles beyond your standard tank/DPS/heal. There has been some success with that in previous raid bosses, and I'd like to see it expanded more.
It's like the fox that couldn't get to the apples, but said they are bad anyway...that's a "nono" sir.
-solo old raid challanges
-random generated lore puzzles
-jumping puzzles (gw2)
-random generated labyrinths (gw2)
-something similar to brawler's guild, but you would always fight your clone (or some special boss). Once you kill it, clone would get +1% stats. Then add counter for how many times did you manage to kill it until he became unkillable. Same for healing (healing X friendly target).
-racing vehicles (with canons to destroy other competitors) with tracks similar to ones in trackmania (ok, maybe I went too far..but it would be cool )
Regarding topic presented by OP - I think Blizzard are aware of this, it's definitely true that the game has become very stale since around the launch of Cata and I would imagine they thought they could squeeze out another expansion in same vein without losing too many players. Now the next expansion is very important and I honestly think we will see some massive changes, finally. Remember, they know best about their market, they will have all kinds of stats that we could only dream of seeing or knowing about and they would see that people are - in general - bored and leaving the game.
Bring it on Blizzard.
stagnation is the result of that approach, and that is not a good thing. like was said in AC brotherhood "history is the study of change, the study of life. when things become stagnate, that means they're dead."
you can look at all sorts of examples from history, you get a utopia where everything is perfect there? shortly later someone comes by to destroy it because you stopped growing.
I disagree, there's only so much you can do with a "25/10 characters vs a boss" and a lot of it has already been done, movement, gauntlets, timed events, vehicles (meh) etc etc.
When it comes to LFR, I solo tanked the entirety of Terrace last night in DPS gear, 40 stacks off Lei Shi? NO PROBLEM - That's not raiding. We're still wiping on Blade Lord 10HC even though we massively outgear it because people are failing on mechanics and it's those mechanics and how unforgiving they can be that makes me love this game.
Personally tier14 (and MoP in general) has rekindled my love of raiding - I haven't had this much fun since vanilla and naxx40.
I think the Dungeon Guide is a catch twenty-two. On the one hand it's nice to know what's going on beforehand and having LFR individuals who haven't done the fight able to easily access information about the boss' tendencies. Then again, there was something to be said about events such as the Opera fight in Karazhan where there were different ways of approaching the sequence and trial and error played largely into the outcome.
Then again, if the Dungeon Guide wasn't in the game people would just go to Wowhead or something analogous anyways. That being said, I do miss a bit of the mystery behind certain boss fights back in the day -- but the game today is less forgiving. If you wipe once your raid will most likely give up if you're not in an established guild.