First, I must congratulate with all the team for the great work you have done. This software looks really great for being its first version, and the feature roadmap is a big step forward. Before that, I must submit a request about the UI. I usually work with two monitors so I can have the palettes on the second monitor and the maximum space reserved to the image on the first one. When I detach all the palettes everything becomes confused as they don't have a border and I cannot distinguish them very well.
Take a look at https://www.dropbox.com/s/i5kamum5he2fydr/Mixed%20palettes.png?dl=0
Adding a simple border or a thin shadow would make the job IMO.
That said, it would be a great enhancement to have customizable workspaces for different situations. Still in terms of usability, customized sets of shortcuts would be very useful. I was very pleased to see how color management is well supported inside the application. Here too, having the possibility to save different color settings would be useful. All these requests comes from the professional field as I do a lot of retouching and color correction every day. More suggestions very soon. Great work, guys! :)