*one more deep breath*
Okay okay so...can I still expect a classic 3 and NV experience here for the most part, sans a revised Perk/Leveling up system?
Pretty much. Everything they've shown so far screams Fallout, it just has more depth in the world elements and less in the dialogue/stats.
If I build a settlement, can I leave it alone or will I come back to find it destroyed.
I don't know. They did show off turrets and guards at E3, so my assumption is that if you left it with no defenses then it would be destroyed/attacked.