I'd love to see the followin feature, as I used to use it all the time in my previous file managers.
For the two-pane view: a keyboard shortcut to quickly set one pane to display the same directory as the other pane. It could be e.g. "CTRL + arrow right" if I have a directory X opened in the left pane and want it to be opened in the right pane as well.
I jump around direcotires and move around files super ofen. This feature will really help. I miss it from tools like EF Commander or Total Commander.
Otherwise super happy with OneCommander.
Thanks.