Equivalent to 'smart speed' in podcast players, offer a non-destructive process to shorten detected silences.
Speakers sound more confident, dialogue flows more smoothly for inexperienced speakers.
Analysing the waveform to determine the difference in volume between 'speech' and 'silence', you'd be able to offer users the ability to shorten any silence of at least, say, 300ms down to 50ms.
Adobe Audition offers this destructively with Detect Silence; Ferrite for iOS non-destructively with Tighten.