Because they are getting to high. I mean we all understand that fees are good. They give incentive for stake holders to forge. They keep the block size down so that people aren't storing more transactions than they need to on their computers for all of time. But we should really try to not put ourselves at a competitive disadvantage with bitcoin in this respect. I think the time is just about right to kick it back a single decimal place.

*edit* down to 0.1 nxt, not 0.01 nxt like some people are suggesting.