yeah, they have a tough path. but the NCAA WLAX tournament is relatively small, and as such there aren't many "easy" matches.
to some extent, you could argue that PSU is in the easiest bracket, as the #1, #2, and #3 seeds are in different brackets. The top seeds in PSU's bracket are #4 seed Boston College and #5 seed Stony Point.
If PSU gets past Penn, then as you noted they'll face Stony Point. PSU faced them in the past 2 weeks, and lost to them, so it will be a big challenge for PSU to get to the bracket final.
FWIW, Maryland is the #1 seed, UNC is the #2 seed, and James Madison is the #3 seed.