I'd like to suggest an improvement for the Delete Silence feature. Right now, the two choices are "Deleting Silence" and "Trimming Silence." It would be nice to have an option for "Scaling Silence." This would reduce or expand the time of silences by a chosen percentage. That way, you could reduce silences while retaining their relative lengths. For a speech, for instance, this would provide a much more natural result than straight trimming to a standard maximum. It would also make it simpler and safer to increase or reduce the total time of a speech without worrying about local problems.
Excellent suggestion! I've created a new feature request to offer this option in the Delete Silence feature.