Hi,
an Attack-Hold-Decay-Sustain-Release envelope would be really great. I know that there's the Transient shaper but adding Hold would provide another option to shape the volume of the kick sample better.
I am creating my kicks with a synth, then bring the exported sample to Nimble Kick. To recreate the volume envelope it would be really helpful if the duration was displayed in ms. Then I could just simply transfer the value for e.g. Release from synth to Nimble and not need to readjust those values.
I am really enjoying your product and hope you can integrate those relatively simple improvements into the next version. Thank you!