I think "Reactive" is necessary.
Discussion
Can you explain your reasoning?
Right now we need a reactive measure, not a protracted one! This softfork was initiated precisely for the emergency CSAM use case. I think there is no need to compromise on an emergency softfork.
Aside from that, I think the presence of the reactive softfork option will push consensus more towards a preactive softfork, which is good.
The long-term, more cautious action can be discussed later; that is a time-consuming topic.
The question isn't how we ship it, it's when the problem becomes undeniable enough that the entire network wants to ship it. That's the trigger.