I am excited for all these:
sprint at lvl 1
new operation, new war zone, new flash point
ui customization
target of target
new world boss
ranked war zones
Normally in Mmos, I max out a character then, i try levelin a second. I am a procrastinator leveler. I take forrrrrreeevvvver to reach cap on a second toon. But with the new legacy system I am excited to try new class combinations!