I think putting this in terms of "grievances" isn't helpful. Blockers, problems, observations, are all useful to report.

"Worked on adding discounts to the shopping cart page. Went over to talk to Chris in billing about that, and he mentioned in passing that they are planning to move on to SAP next year."

That could be incredibly important information for the team! It doesn't come up as naturally when working through stories as in a round robin.