Day Night Cycle 

I've got exactly the same suggestion from a friend yesterday, so:
Added "Configuration Mode" for easier customization and also added an option to disable the additional bars if you only want to use the main eclipse bar.

Initially I just intended to provide a small addon version of the WeakAuras script without any customization whatsoever so I might have missed some options - if you can think of anything useful, I'm always open for suggestions.

Thanks for the report!
Seems like I missed a huge problem with SharedMedia support while testing. Should be fixed in v1.2a.

Edit: And I broke the addon completely in 1.2a. Amazing! Fixed in 1.2b.

1. & 2. Good catches, I forgot to add several checks when adding those options. Should be fixed in 1.2c.
3. Originally I added a minimum bar height because you couldn't change the backdrop - having the bar too flat would break it. Now that you can change the background I've removed that limit in v1.2c but to do so I had to change some things around which affected bar sizes and positioning. You can try to fix that by using "/dnc convert" but I can't promise if that fixes sizing/positioning correctly for every possible alignment.
4. Option added in v1.2c, can be found at the bottom of the Eclipse Bar options. I'll still need to add more options like size and position for those textures though.

I've also added "/dnc" to open the options menu and "/dnc reset" if you need to reset everything. Initially I did not add a slash command for that because it's quite easy to access Blizzard's interface options and the official function to open the interface options tab does not always work correctly - e.g. the first time you try to open a custom tab it just opens the general interface options. I've tried to work around that but for now my solution is to just run Blizzard's function twice which is certainly not ideal and might cause other errors...

As mentioned in the addon info I'm not a balance druid myself which means there are definitely lots of things I'm missing because I don't use the addon everyday - so:
Thanks for the feedback, I appreciate it!

Sorry for not responding for a few days, I've not been able to spend more than a few minutes at my PC... great time to get a cold. At least WoD is still a few weeks off.
Thanks for the feedback and your kind words, both are much appreciated!

I'll try to take a look at that but I'm currently not sure how to do that in a sensible way. While I do have some ideas I'm not sure about those.
I guess I could just increase the time it takes to fade out as an easy fix for now...

Will be added as soon as possible. I'd hoped to have that added by now but well... without being at my PC it's been more difficult than expected.

Should be relatively easy to add, will take a look.

Yes, I've just found a bug with my implementation of the function to fade out the bars out of combat which causes that to happen - should be fixed soonish.

I'm currently not sure about those two suggestions and I'd rather fix the current bugs and implement a few missing features (e.g. Empowerment stacks) first so that might not happen for a bit. Having a dualsided bar definitely sounds plausible (and, well, it's the Blizzard way of displaying balance power) and should not be that unreasonable to implement.
Having said that I can't think of a way to show balance power with a bar that always goes from left to right - I think that would be really confusing, at least the way it works now. In theory you would have 4 bars going from left to right (0-Lunar, Lunar-0, 0-Solar, Solar-0) regardless of the real "direction" of balance power. If using only two bars (Solar-Lunar, Lunar-Solar) that might work relatively well but then I'm sure it would be more intuitive to have the bars go back and forth instead of only rising from left to right (which would be the same as the aforementioned dualsided bar and Blizzard's way).
I'll have to think about that some more before I get to a conclusion on what and how to do that. I'm always open for ideas I'm missing though.

Sorry for taking so long, I've had some pretty busy days nearing the release of WoD - next version (1.4) should be up.
I've added Solar and Lunar Empowerment icons and debuff icons for Moonfire, Sunfire and Stellar Flare for your current target. Those icons currently do not have built-in cooldown numbers but it should work with addons like OmniCC.
I'm not sure if I've caught all bugs, especially with the Debuff Icons but I wanted to get out a version with added icons prior to the release of WoD. If you notice any errors, please report them!
I've also added a profile system if you need different settings per character which caused quite a few code changes - another reason why the update took so long.

Sadly I've not been able to take a look at a more intelligent "Hide out of combat" function and that will now have to wait a few days until the relaase frenzy is over.