I'm going to be buying cat and reactivating my account soon and was wondering a little bit about jumping right into the LFD system as a tank. I quit when my tank had ICC10H/25 gear and I'm thinking this will be able to get me through the new dungeons. My question is: Will it? I've heard that the jump from level 80 gear to quest greens is pretty large and that the mobs and bosses of these instances can hit like monsters.
Am I able to jump right into LFD out of ICC or should I upgrade/sidegrade to quest gear before tackling them?