I really don't like the diaries. They aren't as much fun as regular quests, in my opinion. So I don't care what the next one is, unless it's Yanille. Then I'll do it
That's not a bad idea, but we just need to find people to make this a reality. Jagex may "endorse" it by putting it on the world select page, but still....if enough players do it, then it would work. But just 3-10 players wouldn't.
The benefit of higher agility is the ability for your run energy to recharge faster. Which it does. As much as I like this idea, it ain't gonna happen.