You clearly are very passionate about the piano and about this piece. I have enormous respect for those who show so much dedication to their hobby.
It is clear from your recordings that you know this piece quite well as a whole. I think what would benefit at this stage is if you focus more on the details.
I don't know how you practise this piece now, but you might want to stop playing through the whole piece many times. Try instead to focus on a section/phrase at a time.
When working on bars 9-12 for example, pay attention to the lower voice. Imagine it is a different instrument in an orchestra playing. Make sure the melodic line sings. I have noticed that not all the notes are heard all the time. To practise, you can just play this line separately.
You can also work on the voicing of some of the chords, such as the passages from bars 43-57. Think of the music as a string quartet.
When practising, you can start with a slower tempo. The important thing is try listen with your ears to the sound you're making and evaluate whether this is what you want to hear. I am starting to use this method now and I have found it very helpful.
Hope you find this helpful. I'm trying to improve on this piece too. Feel free to make further recordings, not necessarily of the whole piece, but just particular sections you are working on. Don't worry about the audio quality -you can use an smartphone or a computer recording software.
By the way, do you play the 1st and 2nd movements as well? If not, I'd suggest you learn them as well as the piece does not seem complete without them.