I've played this piece in concert, and so will try to answer your question.
If it's the point that I think it is, though, is it not fifths in the right hand, and not triads?
I believe where the orchestra is having that lush swell-kinda bit (F, e flat d, e flat f G etc) is where you are talking about? If so, the piano where most of its swirl of notes are will never really be heard over a full symphony orchestra, not in that register. However, the top notes of the top two fifths that are struck can be brought out, and many people do so. It's all your choice, really. That whole first theme really belongs to the orchestra, as the piano never gets it - but you can do what you want.