Not sure when it was added but the little animated arrow at the bottom of the screen feels very annoying to me. Its nice that it clears out if you scroll down a bit. but it comes right back the next time you reboot / relaunch the client. I get it there is more news below. If it weren’t animated it wouldn’t bother me so much, but I like to leave the battle.net client open as this pc is mainly used for StarCraft and the constant motion in the corner of my eye is obtrusive.
edit - and i just realized it comes back when waking my computer from sleep as well. such a nuisance