I'm thinking the same thing. Maybe L80 gear will be the entire difference, but after struggling on the last boss in the Nexus and seeing how hard the first boss in Ahn'kahet: The Old Kingdom hits, I can't imagine how hard these guys will hit @ 80 heroics. I'm hoping that some instances will still be doable, as if I even have 1 or 2 heroics that I can farm daily for badges / orbs, I'll be happy.

By the looks of things so far, i'll be either forced to have my 5s partner (resto druid) start farming tank gear, and probably level my paladin (70) as well.