What has changed since you last performed it and it was well received? Have you lost interest in the piece? Do you think audiences have shorter attention spans now than they did then? Personally, I love the piece, and I think the second movement is one of the most beautiful things ever written. The whole sonata is full of love of life and nature, the fear of impending death, tenderness, wistfulness, resignation. But if you are worried that it will be boring, then maybe better just to pick something else.