As someone who likes to design interesting actions, I always playtest my own designs before submission or publishing my own pack. Back in the days of the AH game company, you had to playtest first before submitting any designs, basically you had to be in the trench's working on other people's nightmarish submissions (grab at Grabovo to name a few).
Personally, I think the worst decision publishers have made was putting the names of the designers on the scenarios themselves, it was and always has been a group effort especially if the designer does not help after the initial submission, they should have their names removed from the design credits. Basically, if your going to submit something, stay with those designs until published, show a little dedication and dont be lazy.
Scott