Well, a) welcome to ThePhotoForum.
Then, b) you will wish for a real camera for Christmas, urgently, I guess

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Also, c) the smaller, framed version is much easier to view than the large one with which this thread began. Thanks for showing it smaller. The frame enhances the photo a little.
The smaller size also shows less of the artefacts your 1.3px-camera-phone-pic shows when shown larger. Which sure helps, hm?
As to your changes ... hm ... well, actually I think you moved the horizon even more towards the centre of the photo by cropping off a bit of sky. Cropping off a bit of water would have brought about a shift of the horizon line towards the lower third. Along with that kind of crop you could also easily have lost the bush in the foreground. To return to some normal print ratio, you could have then cropped in from the right (enough black there that might also "go").
However, I really don't mind the centred horizon in this particular picture, since the colours of the sky that reflect so nicely in the water are just too lovely for you to be wanting to lose too much of them.
I am amazed to see what photos can be taken with a phone!!!