I really like how you've set this text. The way you've used melismas and repeated fragments makes everything flow really naturally and intuitively. This is not easy when working with such a prosaic text. On the whole, I think it's a really charming, effective composition, but the work with melody, phrase structure, and text setting are especially nice.
I agree with the others that the piano part shouldn't be a problem, but you could renotate some of the rhythms to make it even easier to sightread. The recurring rhythm you have in mm. 1, 3, 5, etc. should be rewritten with ties to show every beat. (Basically, it's good practice to show every beat that has 16th notes in it--see the "rhythm" section under https://blogs.iu.edu/jsomcomposition/music-notation-style-guide/ for a better explanation than I can give. This page also explains why it's good to show the 3rd beat in mm. 2, 4, 6, etc.)
The individual voice lines are all really nice, but there are some harmonies that could be revoiced for better balance, easier tuning, and a clearer sound. Like in m. 65, the lack of a root in the voice parts combined with the overtones from the doubled 3rd might create the impression that the choir is singing a different chord from the piano. Not a bad thing by itself, but since singers tune by ear, it's likely to create intonation problems and a muddy sound in less advanced choirs. (And even when you're not missing the root, doubling the 3rd of a major triad can destabilize a choir's intonation, since its overtones clash with the root and the 5th.)
By a somewhat similar token, in m. 45, I really like the move to B minor 7... but it's undermined by the lack of a root in the voice parts (and again, the same sense that the choir is singing a different chord from the piano).