Glad to hear that OS3 seems to make a difference for S0, since I'm not upgrading anytime soon and would be happy if my watch would work a bit faster! Though my biggest want is still for it to have a podcast app, and less importantly, the ability to set songs as "up next" from the Watch. It's still so weird to me how it adapts to controlling podcasts just fine but can't actually start playing them.
"Series Zero" sounds cool, huh.