I agree it seems a bit difficult and complex to implement. But, the basic problem is that Phabricator applies the same filter to all tasks on the workboard. And almost by definition you want a workboards columns to show tasks as they are moving through a workflow (which often times involves changing the state of a task). All in all, I'm very pleased with Phabricator. But, one area that seems a bit less mature than others are the workboards. To me, this is just one example. Again, great project. Thanks for your consideration.

There is already a filter for the whole board that has the following options: open, all, assigned to me and custom. But, it applies to all boards. If you show "all" so you can see the items on my "Done" board, then you see tasks on the backlog that are marked as "won't fix", etc. It seems to me that when working with boards, you only want to see "open" tasks in the backlog (after all, it's not really in the backlog if you aren't going to ever work on it). But, you want to see what's marked as resolved on the "Done" board. A per board filter seems like the best way to accomplish this. If there is a better way, please let me know. Thanks.