Hi,
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

man seriously fuck skyrim,.. it's either the game engine is so terribly coded or that the community is taking this modding business way too far,.. I have nearly 400 Mods installed and still feel the need to add more, its soo addicting,.. now you wana add more mods but you want your skyrim to be so stable,.. I dont know how we will manage,.. but anyways, FUCK SKYRIM