1. Doniphan Mo, Model 2/5 pin is actually the Sterling 2V8. Haven't heard it go off in years but it does have power hookups running to it.
2. Naylor's Darley 2 is not longer there to my knowledge, but the Model 3 is still sitting on the former water tower pump house. Both definatley inactive as the OA-3 is the main siren. Also, the Private Thunderbolt on H-5 Highway outside of Naylor is mine

3.Union's Model 5 pin is a correct location. I am unsure however if it stands currently. I last saw it around 2013/14. The Darley is inactive as well as the 5.
4. "Something" pin on Wild Horse Creek Rd. in Chesterfield is a former firehouse Model 2. I don't think it is still there, but it was. Saw its control setup in 2013 before the 2910 was installed however I think it was inactive even then.
5. The Model 5 in Wright City is no longer there, nor is the water tower. The Sentry remains.
6. Model 2 at the intersection of Hwy D and DD no longer exists.
7. Springfield's 2 SD-10's are known active as of 2016. STH failed me when I tried to record it in 2016, however with the notice in your descriptions that the 2001 that used to be near the STH has seemed to be moved, it is likely that it is used by the campus Emergency system again. The SD-10's should still be active as they are probably original to the buildings they are on.
That's all I can think of. Love the map, found a few cool things I did not know were out there. Hope my 2 cents help a bit.