Actually there are currently five places you can go to check out the changes, and very soon there will be a 6th one added.
If your going to be playing a necro again, you have three.
Freeport Starting Island, Darklight woods [Neriak], and I can't remember how to spell the one for Timmours Deep.
I do not know how far you got your necro before, or if you still have it, but you may want to go and start up a new one given the massive amount of changes that have happened since launch, infact recently SoE redid on of the first AA tree for all classes. Thats right, we have AA now, slider and everything, and can start earning them at level 10