Even though there are nearly 200 event types in the database (not sure if they are all used) there are a few that I think will improve quality of life.
Ground Survey Complete
First, and probably the most important one, is one for when a ground survey has completed. Currently, when the ground survey is completed, the message uses the same event type that your geo survey ships use which does not interrupt auto-turns, so if you miss it then your ground survey team will be sitting idle for potentially a very long time. I think a new event type called something like "Ground Survey Complete" that DOES interrupt auto-turns would be extremely helpful.
Civilian Ship Scrapped
Secondly, when civilians scrap a ship the message shows up as a "Ship Scrapped" event type which interrupts auto-turns; however, I, and I'm certain most players, don't care when that happens. Adding a "Civilian Ship Scrapped" event type and setting that to not interrupting auto-turns would solve the issue.
Jump Point Stabilized
Also, and this one can currently be mitigated by using the send message ship order, there is not an event type for when a ship stabilizes a jump point. I often set my stabilizers to work a whole chain and if I don't have them send me a message each time they complete one then I won't know it's done until the ship has complete the entire order chain (without periodically manually checking, of course).
Manually Assigned Commander Died/Retired
The final one is for commanders. It is very frustrating when a commander that you have to manually assign, such as for a naval admin, a fleet commander, etc., dies or retires. There is no interrupt for when it happens because the "Commander Health" event type does not do so. I don't think we would want to be interrupted every time that event happens, so a new one called something like "Assigned Commander Died/Retired" might do the trick. Alternatively, new event types for "Missing Naval Admin Commander" or "Missing Fleet Commander" could do it, but there are likely times that you just don't have the commanders to fill all the spots so that event could get spammy. I've lately started just marking them as Story Characters to avoid the problem, but I'd rather not do that.
UI
Lastly, it would be absolutely fantastic if there was a UI for modifying whether an event type interrupts auto-turns. I personally don't mind since I can easily modify the database, but I think a lot of players would love that feature.