Kanban has a practice of limiting the work in progress in a particular stage.
It would be good to have this!
e.g. in a particular stage, the ability to define a soft limit on the WIP, which could be:
- number of tasks in that stage for the project
- total of estimated hours of tasks in that stage for the project
- total number of tasks assigned to a user
- total estimated hours of tasks assigned to a user
When that WIP limit is exceeded, you'd want to highlight that it's over the limit.