Few comments after playing the latest version a bit yesterday.
 - UI feels "sluggish", can't really describe it any other way.
 - Esc should close the last opened window
 - Listing the keybinding in the tooltip of the respective action (so you don't have to dig through the settings menu unless you want to change something)
 - better graphical feedback when performing an action (change the cursor or something) as I sometimes play without sound enabled (or on very low volume).
I might have missed these (admittedly didn't look very hard at all), so putting these separately.
 - didn't immediately find a key to open the character screen, neither C nor P seemed to do the job, these are imho the most common bindings for this (from Character and Profile, respectively)
 - a key to end the turn (backspace, like in XCOM maybe?)