Being able to cancel a running request instead of having to watch the Agent go in the completely wrong direction and rollback and try again is a needed.
Being able to collaborate with the agent as it is thinking to guide it in the right direction was great, now it is gone. Why? REVISED. Send immediately in the queue allows this to happen. Not interactive, but good enough.
Sure having a queue of pending ideas to get done sounds great, but in practice you have to get the first request done and revised before you should move on to the next step.