I suspect you may be using the vocal score (which has four staves) rather than the piano score (with two staves, and the voices optimally distributed between the hands.)
In the piano score (I use the one published by Breitkopf no. 3765, since it is easy to read – large notes and all), the few instances where you have large intervals, they usually occurs in the left hand, and they are easily negotiated by playing the top left hand note (tenor) with the right hand. (And yes, you can arpeggiate them if you prefer)
I hope this helps.
Best wishes,
Bernhard.