Wow, great job on this. The only thing I would be aware of in this context is cheeseyness. When you have everyone land on " is also Great!" its going to sound pretty funny to most audiences. You've got to remember the meaning of the text is not pretty and couragous it is dark and horrible and most of the music fits beutifully except for that part. I don't know if the uplifting chord at the end fits it either.
I'm not horribly familiar with the literature, but please look into this because it might not be good for you if you have this played and some elderly lady with an umbrella decides to clober you over the head.
On thing you might consider is altering the timing out of 4/4 and 2/4 to make it feel more organic with the holds and just place fermata's on them.
Most importantly though I would like to congratulate you for your work on this beautiful piece of music. The sus chords chill me to the bone in a wonderful way.
If I may make one more suggestion? Do more great work like this.