i played tank in the beginning of cata had my own healer with me, because alot of people werent even 85 and rushed easily through the 5 mans. I dont get why people think the 5 mans were hard, they were harder than the wotlk dungeons but nowhere as hard as the tbc ones at start, ugly as hell. Overall, i liked some bosses in t11, ragnaros was a good fight liked deepholm as questing area and thats it.
There is nothing else to say good about it from my side.
i liked all the expansions before, never played classic, cant rate it and mop is still better than cata, atleast its a new continent, nice colors and better raids for sure. The 5 mans are pretty bad in mop though, liked them in cata better minus the troll ones, they were just disgusting, did know their originals, maybe the zone just felt to old.