I don't know if it can be changed, but before when a thread would pop up it'd have the user who created it's icon, now it's whoever last posted. This isn't a big issue but I just get confused and think "Why would I ever be following something that disgusting BoredBrit has made?" instead of this informative thread.
I just can't increase the number of threads, though. 5 seems to be xenforo 2's set limit, but since I want it a bit more, I'll look into it later.