1. Especially for HIIT style workouts, it is essential to be able to custom name your exercises. At least give us the option to have the notes be shown, touch free. Would be great for yoga as well.
2. We need a more intuitive way to filter existing exercises by muscle group. Drop down lists are good, clicking the muscle group would be better, specifying the plane of movement would be cool too. Push, pull, lateral, sagital, rotation.