You can only get the EF attributes and reason codes in a integrator view? You can't get the acknowledgement or comments? Is there something in the future planned for this?
You are right, currently it is not possible to see annotations in PI Integrator for BA. I encourage you to vote for implementing it on our feedback page:
Include Annotations of Event Frames into Event Views – User Feedback for OSIsoft Products and Services
Retrieving data ...