As a user I would like visual feedback when executing queries so that I can tell that the operation was sent to the server and is currently in progress (remove uncertainty).
In Compass (all versions up to 126.96.36.199) long running queries give no feedback when running or when completed. As a result you have to spot the number of results changing to determine if a query is complete. I have attached a screen capture demonstrating this. Sorry about the background noise on the video. I was in an airport lounge