What happens with gear checks is they arbitrarily stretch out the time it takes to kill the boss and then it dies the next reset someone gets to him.
Without gear checks everything would be downed the first week.
And top guilds had to use BL AND 5 Healers to reach that! When we arrived to Lei Shen heroic, we reached the 65%/4th Thunderstruck without BL and we even had 1 more healer than top guilds.
The Berserks should be like Lich King 25HC(albeit, not with such a high DPS requirement that you needed weekly/monthly nerfs). Lei Shen Heroic "berserk" was just that healers couldn't keep up with Winds damage anymore. I don't even know if Sha of Fear had a berserk timer on Heroic, since you were 99.9% more likely to wipe from being overwhelmed by Adds.
Atramedes post-post-post-post-post-post hotfix, anyone :P? The one where you'd stand in the doorway and dps him, then run when he flew up and just run forever, then come back and dps him for a little while untill he flew up again and repeat untill dead. If there had been no enrage timer or gong-soft enrage mechanic, this would have made the boss incredibly easy (not that it wasn't already).
Garrosh won't go down so easily. He's supposed to be a brutal gear check.
But something like Sha of Pride, with a good soft enrage, doesn't need a tight enrage. As you said yourself, Sha of Fear had a good soft enrage. Early on that enrage timer was of concern to guilds; but was made irrelevant quickly.
These fights are improved by adding variety, the same as any other mechanic.
The Siegecrafter enrage is one of the best yet, he doesn't technically enrage at all, he just starts pumping out superpowered weapons that are going to wreck your shit.
14/14H SoO <Divinity>