The next ArcGIS Online update is targeted for September 19, 2017.
While no significant user interface enhancements are planned, our goal is to provide new functionality in areas such as:
We also plan to include bug fixes to ensure we continue to provide you with high-quality software. Please note that all planned updates are subject to change. We will provide a comprehensive list of implemented changes in our upcoming What's New email and blog.
Only ArcGIS Online administrators and those who have requested receive notification emails so please share this with other ArcGIS Online users in your organization so they can stay informed as well. They can also opt in to receive notification emails.
The ArcGIS Online Team
Thanks for sharing. Clustering will be a great addition!