Bull, I did not say mechanics should be ignored. You're putting words in my mouth.
Over-tuned means exactly what I said. It means that the punishment for failing to meet a mechanic is too punishing for what constitutes a NORMAL mode raid. Save that "be perfect or die" crap for hard modes where they belong. T11 fights had it. Firelands has it. And I'll lay money down that says Dragon Soul will have it too.
If you think the mechanics of normal mode Firelands were overtuned, you must think the troll heroics are overtuned.
Venoxis? Stand in poison: you die.
Mandokir? Stand in his aoe attack: you die.
Kilnara? Slightly more forgiveable in that it is possible to survive while butchering mechanics, but god help your healer.
Zanzil? Don't get the poison debuff: you die. Get hit by the big add: you die.
Jin'do? Once again, you don't have to be perfect, but missing more than one slam will likely wipe your group. Taking more than one tick of his lightning will likely kill you.
Akil'zon? Get hit by the lightning: you die.
Nalorakk? Taking consecutive hits won't kill you if you are topped off (which isn't hard to do), so it is decently forgiving.
Jan'alai? Get hit by the fire explosion: almost certainly an instant kill. Stand in the fire line: almost certainly going to cause a wipe or a death.
Halazzi? A joke, if you execute the simple mechanics. Try it without standing on the healing pads and killing the lightning totems and see if failing the mechanics is forgivable.
Malacrass? I don't think I've ever wiped on him while tanking and maybe only once while healing on my Priest. However, if you stand in stuff and don't interrupt, the fight gets a lot harder than it needs to be.
Dakaara? The price for not executing the mechanics on this fight ranges from one-shot (Lynx needing to be taunted), to unhealable damage.
Not executing mechanics should be punishing, whatever the content level, else, what is the point of the mechanics?