GW2 is not your typical mmo. The game is broken into different parts which is not always for everyone.
PVE side there is achievement hunting, like over board on that shit, with more to come with every living story update every 2 weeks. The new season of living stories are about to start and they promise to be harder and rewards harder to get as you will have to actually play through to the end of the living story to get rewarded, unlike before you just had to complete the meta achievement.
Introducing the Story Journal | GuildWars2.com
Dungeons are the same since the start, they've tweaked some paths I guess, I don't know I never do dungeons as I hate them in this game, but nothing really new except for I think 1 path which was added last year. Fractals are also the same ole same ole but supposedly good rewards. They've turned the traits system into complete shit, you start getting traits at 30 to 80 now instead of 11 to 60, at every other level or some shit. Harder to level but thankfully they've added ways to earn tomes of knowledge which gives you a level. Item progression wise, you'll get to exotic level at level 80 pretty easy, and then stonewalled until you grind enough gold to get the mats to get your armor or weapons professions to 500 in order to craft ascended items, anywhere from 200-600 gold, but at least ascended items are now account and not soul bound anymore.
SPVP they've thrown away the old reward system and put into place new reward tracks, which admittedly got me into playing spvp again for a little bit, you can get regular dungeon rewards out of it. New death match map where everyone fights in the center of the map but it's not in the regular map rotations you have to go into player created rooms to get it. Not sure what else is new.
WvW they've added the edge of the mist map which is the overflow map for when there's queues in WvW, you can access it without queues, it's basically turned into a karma train map because the rewards are better than regular wvw and you don't have the pressure to defend anything. Season tournaments are now being run, they've done two in different structures, but both times they sucked because of shitty matchups and once again population imbalances which anet was directly responsible for. WvW can become stale easily if you don't have a guild to run with, same maps, same shitty unlimited stealthing thief roamer kicking your ass in your zerg build, same ppting which probably 75% of the players no longer give a shit about they just want to smash their heads into each other these days.
For a game that was built on cosmetics being the big thing, they sure make a lot of shitty looking weapons and armors, the only weapons that ever look decent are the great swords and shields and that's because of their sizing, 95% of the stuff in the game needs to be bigger and given better effects. Looking at the new pvp weapons today was depressing, not even going to bother buying them, save my tickets and see what they offer next time.