I have the same issue, but it seems bDeferredShadows can't fix it, neither removing enbhelper.dll from enbseries folder.
I've tried with a clean install, with many different presets, and only *interiorday and *interiornight settings are working.
Furthermore, sun seems to be nearly invisible behind clouds.
A little example with default enbseries settings, just outside whiterun, 11-12h, weather set to 10e1f2:
Enb disabled:
http://i.imgur.com/97MfiXo.jpg
Enb enabled:
http://i.imgur.com/lM6LUxk.jpg
"Sky" enabled:
http://i.imgur.com/vC2s4WK.jpg
"Disable wrong sky math" enabled:
http://i.imgur.com/uaiAiNH.jpg
Changed CloudsEdge* settings, sun is now visible:
http://i.imgur.com/tuwQiy6.jpg
Changed GradientTopIntensityDay, no difference:
http://i.imgur.com/oqgPwlH.jpg
http://i.imgur.com/XW7Bnx2.jpg
Changed GradientTopIntensityInteriorDay, it works
But in exterior 
:http://i.imgur.com/h1jUkIy.jpg
http://i.imgur.com/vVF8Oy3.jpg
Statistics:
http://i.imgur.com/I8WoyML.jpg
http://i.imgur.com/fgz8Gfm.jpg
Does anyone have any idea to fix this, please?
Configuration:
Enb: tried with every binaries from v200
TESV: v1.9.32 ( hex-modified the two "d3d9.dll" strings to "d3Fx.dll" otherwise ENB won't detect my gtx 780m, even with optimus fix)
No mods except Bethesda HD texture pack
GPU: GTX 780m (+iHD4600 - sadly I can't disabled it without loosing video output)
CPU: I7-4700mq
OS: Win 8.1.1 x64
ini: http://pastebin.com/Q6G5hS8P
