One way to fix Level of detail (LOD) is by tweaking engine.ini adding this variables to override the engine.
r.SkeletalMeshLODBias=-2
I use this in every UE4, now i can zoom out the camera without losing geometry detail.
Other "tweaks" i use, keep in mind your system. 2600k @4.7 with a 980ti in my case.
[SystemSettings]
r.Tonemapper.Sharpen=0.0 (adjust the sharpening effect MXGP 3 and 4 overdue this)
r.MaxAnisotropy=16
r.SkeletalMeshLODBias=-2 (already mentioned above)
r.PostProcessAAQuality=6
r.MotionBlur.Max=0.26 (great to reduce the amount of blur but keeping some sense of speed)
r.Streaming.MipBias=0
r.DetailMode=2
r.MaterialQualityLevel=1
r.MotionBlurQuality=4
r.BlurGBuffer=-1
r.BloomQuality=5
r.FastBlurThreshold=7
r.Gamma=2.2
r.TranslucencyVolumeBlur=1
r.SceneColorFormat=4
r.AmbientOcclusionMipLevelFactor=0
r.AmbientOcclusionMaxQuality=0
r.AmbientOcclusionLevels=2
r.AmbientOcclusionRadiusScale=1.0