Control blurriness and brightness of LookDev HDRi

Easy. I mean this feature available in Marmoset Toolbag, Substance Painter and other texturing software. I was curious why Blender's LookDev mode didn't have it from day one. By default when I add custom HDRi to scene lights dropdown and select it it shows up all of a blurry and I cannot control how bright it is to light my objects.