Hi Kurt!
Thanks for point this out. Normally, in terms of configurations, there are no changes that make you modify or add something to what you have already configured in Configuration Tool. However, during O11 there was an infrastructural change to the invalidation cache mechanism that required an extra confirmation, in this case for the RabbitMQ.
We will follow up with this and let you know when the checklist change.
Thank you for mention this out and continue those ideas coming.