Could someone explain some things about Jhin to me?

I had been waiting for Jhin's Q&A since he was announced, & on the day of his Q&A, I waited till around twelvish before having to take a roommate to work. Unfortunately, another roommate tagged along, & decided he wanted to stall, & hang around walmart to get out of the house, & ended up coming home around fiveish. I got on only to find Q&A was finally up an hour after I left, & had three questions I really was hoping Riot could answer. I knew I was too late, & wouldn't receive an answer, but I tried anyways.

Is there anyone who could clear some things up, or answer these questions for me? Please, & thank you!

"Hey Riot, I have three burning questions I've been hoping you could answer for me since I've heard, & played Jhin:

-Who's Jhin's voice actor? Edit: I was silly, & thought it was Zachary Quinto for a moment before reading through all the reds on his Q&A to find an answer to this one. -Sometimes when I use Jhin's ult, it automatically ends without reason when trying to hit enemies. Is this intended? -Could you please explain his passive when it comes to gaining attack damage from attack speed runes, & how running attack speed runes is more helpful than running attack damage runes?

The last one has been burning in me for a while, & I'd like to understand the reasoning behind this, & the benefits of running attack speed runes over attack damage if he gains no attack speed."