Some might have a hard time adapting to the new gameplay of GW2.
First time i played GW2 it was hard and i wasn't used to the combat and movement. In BWE2 it felt alot better and i had a better grasp of what i did. Also, i think some content might be too hard, it's not like you can rush into 3-4 enemies and take them on in early levels, i always had to go 1vs1 and sometimes i could survive 1vs2.
Guild Wars 2 is ready, but the players are not ready for Guild Wars 2.