GW2 is a completely different game from the first one. No GvG, no RA, no more incredibly complex builds from combining two classes. I loved GW1 and really wished GW2 was "GW1, but you can jump now."
I wish they updated some of the visuals like other MMOs often do after many years. I like GW2 and gameplay still works well, but it looks so dated compared to other MMOs that refreshed most of their stuff.