I use this feature very frequent. But there is a lack, who disturbing me.

my dynamic-playlist is configured as following:
Last.FM - Similar Artist (applied on artist) - 50%
Proportional BIAS - UserRating > 3 - 10%
Fuzzy BIAS - Points > 50 - (accuracy) 50% (to suppress tracks who i skipped frequently)

if i generate a playlist of 100 tracks (10 leading, 90 generating) i suffer frequently from the fact, that the same track is placed very often in the list. Sometimes the same track is placed five times directly after each other.

So i have two toughs to improve this situation:
on way could be, to have a option like "don't repeat the same track in the playlist"
the second could be a bias like: "don't play a song twice within <timespan>"