From waht i understand normal mode and heroic have the exact same mechanics, just base health and damage is increased. So more aoe damage and enrage timers are stricter.
Bash is not just weird, he is correct in everything he stated, the end of the 25man raid if coming. Xpac is 71 days out 10 raid weeks, Which realisticly means 6 raid weeks or less because 6.0 changes everything