One feature I thought would be handy is something like a worker group.

Essentially a way to mass manage a handful of workers.  For example, create a pool, and update 9 workers at once to all use it with the same login, password, priority etc.

I currently just use SQL to do it manually.  Add a worker_id/pool_id combo manually, and then an UPDATE .. WHERE pool_id = to add a pool to every one of those workers.