I agree with these and glad to hear @mdubakov that this is in the works, I believe you’ve mentioned this in another context in fact.
I’d like to add that I’ve found very useful, and I think Targetprocess has this feature as well as tools like Leankit, to be able to have a “state above state” in Kanban, where you an break up columns. For example, the left-most column would be “unstarted,” with sub-columns of “parking lot” and “in planning” and “ready for development” for example. The Review column would have “ready for review” and then “in review” for example.
Very eager to see the improved Kanban stuff when you guys can get to it!