Oh good lord, this is the first time that I have done a critic, so this is probably not going to be that great. I will give it my best shot though.
Lets starts on the positive shall we? For one thing you background with the stars feels very realistic. They glow just as real stars were glow and it is a well fitting background. The shading is also pretty good here. The shading mostly goes where it is supposed to which is a very good thing. The overall mood is well done as well as the majority of the shines on the rocks. The water looks rather good as well. In fact, my part of my critique that may be negative are just nitpicks, but they are nitpicks i feel I should note for your benefit.
Parts of it feels kind of sketchy and the rocks don't seem to feel as hard as they need to feel due to being well, rocks. The tree also needs so work due to it not looking like bark of any kind on it. Also, as show in the past with some MLP episodes, the magic does indeed glow, so there needs to be some magic glow on some of the parts that do not have them. As I said, I am nitpicking. Oh and the bush could look a bit more bushy and not as rushed.
Overall this is a vast improvement from the last and it is a very fitting update to the last drawing. I has the mood and the light to show how many mixed emotions are going through Princess Celestia's head and the fact that it made me think for a second is very good. I would be proud of the result that this drawing came out with.
You did a good critique! Keep it up! Any thoughts are helpful as long as they're not blind praise or blind hate.
I'm not really sure what you mean by it feeling sketchy. There aren't any sketch lines visible (Or outlines of any kind). I see what you mean about the rocks though. I need to focus on materials and textures more. I see what you're saying about the magic glowing, but I think that would have been too much light, and I think the dull glow present now makes it look feeble and sad.
Thanks! I'm glad you like it and I thank you for the critique!
Not a problem. I did my best that I could to say it in a way that would make sense. I am glad that you were good with how my critique was.
As I said, keep it up! Some people aren't very receptive to critique. That's their problem, not yours.
As long as you're nice about it, and you don't say things as if your opinion is absolute fact, you'll be perfectly fine.
Sorry for some of the typos, I am afraid I did not see them before it published.