So the initial response from PTS is that every aoe ability has been changed to a 6 target cap. I cannot express how absolutely disgusted I am by this change. GW2 tactical game play was effectively destroyed because of this kind of cap. Stacking should never be rewarded and that is exactly what is happening, before even giving players a chance to learn to adjust from the bad habits they picked up in other games.
Not to say all abilities should hit everything, but blanked cap on number of targets is just outright stupid.