Walter, I feel we usually agree, so I think we are closer that it would appear in our approach to this question.
I come to Op. 31#2 with the advantage of 2 centuries of interpretation and the benefit of having heard this piece, and played it, many more times than Beethoven did. I come with the disadvantage of having never heard Beethoven play, nor of being in his head.
Between Beethoven and me there are a bunch of black dots on lines and a few signs Beethoven left, like p here and there, largo, allegro, adagio, etc. and pedal markings, which alas may as well could have been left out. He also left a few fingerings, which I currently not understand and usually do not follow.
When I said "The pedal marks are Beethoven's. They shall be observed." I was half-jokingly quoting Schnabel (I think). I agree one should be curious and creative, and would add that you should play it the way it sounds right to you.
That said, I find modern students, particularly teenagers, are too quick to dismiss the written instructions on the basis that it can be played another way. So be it. Blurry harmonies are historically accurate and stylistically appropriate here. I think you agree, since you play it with pedal as written.
Those clusters and silent notes are anachronistic. This is not Ligeti or Normal Dello Joio.
And I take exception that the fortepiano is an inferior instrument. It just is a different one. If you don't like them, don't play them. When I play Beethoven on the modern piano I am constantly aware that it is a different instrument. Same thing when playing transcriptions. All very worthwhile music that sounds great on the modern piano.
One last thing. The halls now are much larger. It kind of cancels out the increased resonance of the modern instruments. Changing pedals sounds unbearably dry to me, so I don't.
I'll quote Landowska again half-jokingly. You go ahead and play it your way, I'll keep playing it his.
