It would be useful to have an indication that the data is still being loaded. Currently when you add an attribute to the display, change the time range of a display, execute a dynamic search, etc you don't get an indication that something is happening. Some of our operations are quite far away with limited bandwidth.
In PI Vision 2019, additional busy indicators have been added and the use of busy indicators is now more consistent so that it is clearer when data in a display is still being loaded.
For additional information on PI Vision 2019 check out the release announcement here: https://customers.osisoft.com/s/knowledgearticle?knowledgeArticleUrl=kA01I0000007AdxSAE
Csaba Galambos commented
When using search criteria in asset comparison tables, it would be nice to see how the searching progresses. A busy indicator would be useful when filtering hundreds of assets by more than one criteria, because scanning through all the assets takes a while. Users tend to be impatient when they don't see that Vision is processing data, still nothing happens.