Thank you very much for the critique! Uhm but before putting my vote for fair or not, I feel just a quick reply to confirm a few things is needed if that's okay.

Yea I do see what you mean by the water, it's an error on my part as I've intended to give it a foggy appearance with an inner-innate glow coming from within the water, the location is placed in a more mystical-type land but in the end I wasn't able to portray this from just looking at it. So yea, I agree with that.

I'm not sure about the mention of Fluttershy's size, in relation to the drawing, however. Perspective-wise allows her to be up close to the camera, even then I didn't make her too large to clip out of the view, nor too small because I wanted to keep the characters in focus, Fluttershy especially being a key part to the composition.

I guess the main point I'm curious about is if you can elaborate on the 'room for improvement', because using that phrase leaves a lot of questions. If that's all you meant, the two things above, then alright that's all. Otherwise, please explain a bit more if that's okay.