Hi !
First: I upgrade my TW via “zypper up” not “dup”. That’s right, or I missed something?
Second: It’s a good idea subscribe to factory mailing list. when a new snapshot is released there’s a useful mail that resume the changes.
After that if you have enough time you can update, or wait a bit if someone reports some kind of bug, or report yourself! 
More or less there’s 4 new snapshots published in a week.
've phun!!