First, thank you for your input. You are actually the first people who can give me serious comments, so you're playing quite an important role at the moment. (I don't want you to be my teachers, of course, and I won't post a piece more than twice within a shorter period.) I'm nowhere near perfect with this performance, but I decided to post it as I felt there are things in this piece I'm overlooking due to the teacher I currently lack.
Second, don't forget it is marked "Andante". I know that a romantic andante might be slower than a Mozartian one, but it still doesn't mean "slow". So you aren't allowed to bore people with it, that's what op.62/2 is for...
Serious, I don't see why playing extremely slowly (or extremely fast with fast pieces!) should be more sophisticated than "normal" playing. Just because a piece like this has an enormous musical substance, you cannot make it as slow as you want. Just my two humble cents.
So I'd rather concentrate on musical and technical details if you consider it not good enough; I won't change the tempo much.
If I may say one thing, it's that this sounds a bit literal and impatient. I do not find the rapture, wonder and repose here which makes this such a magic piece.
Could you explain this a bit?