Blizzard have taken some steps to alleviate the very common lag in the Azure Span and are asking for feedback.

Azure Span (Source)

Hello everyone.

We recently made some adjustments to the Community Feast that was contributing to lag in the Azure Span slowly over time after each feast as servers were up for a few days. How has your experience in the Azure Span been recently?

These fixes should have improved the performance in the zone since the feast was the main culprit, but we’ll continue to keep a close eye out for any other sources of lag that may appear.