Its a minor thing but I find it annoying how small the arrow indicator for directional lights is, which shows the rotation of the light.
I can increase the size of the billboard icon of the light, but not the arrow. ORRrrr am I just missing the setting somehow? 
Hi Manatee,
Thank you for your request. I have entered a feature request, UE-21537, to be considered by the development staff.
Cheers, thanks!