So yeah, it would be just a function for quick preview and setting up the start/end/loop points in the sample editor, so the playback should be separate from any of the modulation/gain/effects of that sampler module - just raw playback of the sample, modified by the settings you set up in the sample editor itself (volume, pan, pitch, loop/xfade).
Oh, another thing: Mouse wheel horizontal zoom to the waveform would be very useful if these workflow conveniences are implemented.
Cheers