I feel i should remind you that sometimes it's unrealistic to ask or expect not to be killed when submitting a feedback as many pieces of feedback with the exception of signs or broken doors are left in highly contested areas such as choke points. It's unreasonable to ask the game to be paused for 30 seconds whilst one person writes an annotation.
But there is however nothing stopping them from revisiting or visiting the map prior to test sessions to avoid that dilemma.
As for the non-regulars who probably don't have that level of patience i should remind people that Geit did add in the functionality to view and leave annotations whilst in spectator. So instead of trying to unsuccessfully leave feedback during combat there's nothing stopping you from jumping into spectator the next time you die and flying around for a bit to assess and leave the relavent feedback.
Only just saw this message, sorry for the double post! - As part of Milestone 3, functionality will be added to "bookmark" a location. When this happens, the back end will attempt to download the map and take a screenshot of the location. The screenshot will then be uploaded to the web panel, and when the player next joins the server, a new round is started or the player enters a specific command, a dialog will pop up and ask them to annotate each screenshot. They will also have the option to skip doing this if they've forgotten why they bookmarked the location, the bookmarks will automatically be deleted after 7 days unless they are annotated.
That should help with the problem of having to break the flow of the game to create a feedback. It could also be bound to a key to make it even simpler.