Oh yeah, Halftooth and crazy cap guy; I think Aro has quite a lot of techniques compared to his peers, but it makes sense for someone trained in such a different age to have a little more skill and jutsu under their belt, while talking plenty of time to getting readjusting to the world.
On that subject, I am considering changing how long since he Captain America'd; so he might've been thawed only, say, a year or six months.