Official comment
You don't need feedback from everyone; here's the list... MK2 adds:
- FLAC / ALAC support
- simple HID connection (connect 1 USB from an XDJ to linked players; driver required)
- rekordbox LINK export
- higher detail / RGB waveform
- new phase meter
- needle countdown
- "MATCHING" browse mode
- new shortcut button
- track filter
- 8 hot cues vs. 3
- DDJ-SP1 support
- digital output