First the possible bug – it seems the app is running in background even when it’s disconnected from Computer USB and drains out the battery. (I’ve noticed this behavior several times in past weeks) and the battery stats in system preferences confirms this issue.
Second, a suggestion – make the playing clips more noticeable in clip view. Right now the active clips can be hard to differentiate from inactive ones, especially when the progress bar is really short. I’d appreciate to have for example the background of playing clips in the same color but darker shade as the clip color. Or a border or something else. Just to make it easier to spot. 
it’s not only my issue but we’ve agreed on this during our weekly jamming session with few other friends who tried it.
Otherwise it’s a great app! It makes launchpad mods and other stuff look ancient and user unfriendly. Looking forward to future updates!