I don't know how to answer endgame questions because I don't know what people are expecting. The dungeons were buggy early on, but the balance issues were mostly with the bosses. There's still alot of meat shields left which is what I imagine is part of the next dungeon revision. I liked a lot of the dungeons, so I can't say if you'll like them more now. If you stopped at 71 then you never got to at least three or four dungeons in the game.
Of course, they've added Fractals of the Mists which are some of the game's better dungeons. FotM is a collection of mini-dungeons you play in sets of three and four that increase in difficulty as you pass each set. These dungeons drop a special token that can be used to buy Ascended gear and infusions. After you reach the 10th level of difficulty, there is a chance for Ascended items to drop for you. Ascended gear has higher stats than exotic gear, but there are currently only Ascended rings, backpacks and amulets.
They added Southsun Cove or whatever, but there isn't a lot going on there anymore. It was busy during the event but is mostly used for harvesting now.
There's been new dynamic events added, new jumping puzzles and mini-dungeons to the open world. They just started the game's first "Living Story", but it's in its very early stages and I'm not sure what it really will entail. It's basically some NPCs in two lower level zones making a refugee pilgrimage across the zone with a couple added events.
Then there's WvWvW which is still WvWvW. Big PvP patch is supposed to be next month.
Honest answer
Welp, I'm downloading it now. i'll see how it goes. Maybe get back in EuroGAF.