Whenever I need to increase the speed of an audio clip while maintaining pitch, I resort to taking it out of Premiere and into Audition because Premiere's "Maintain Audio Pitch" sounds terrible.
I don't love that workflow, because it replaces the original clip destructively, so if I need to go back and adjust the length in the future, I have to hunt down the original clip and do the whole process over again.
I figured out a workaround to non-destructively alter the clip within premiere by using the pitch shifter effect combined with the speed effect (see video).
The fact that I can easily do this with Premiere's own tools begs the question "Why isn't this simply how the maintain audio pitch option sounds?"
I'd love to see this feature fixed in Premiere.