I upgraded my firmware to 2.0.5. So far so good as the control is better a lot. The sound is good for myself personally (remark: I used slow Roll-off). Hope they will issue another update soon. In addition, waiting for their 64 bit driver of DAC.
Improvements with this firmware: 1. The slight lag of the control buttons' response, has been eliminated. 2, Missed last 2 seconds of songs rectified. 3. Touch screen sensitivity has been adjusted.
4, Improved read speed for exFAT formatted SD cards.
5, Optional digital filter added.
6. "Charge Only" option added into USB settings.
7. Power off confirmation screen removed.