I just received 19.09 on my 965. I assume its a Beta , but not sure.
So far I have noticed:
Scrolling the widget or settings menu now has a haptic feedback (not sure if one can turn it off) UPDATE There is a Haptics switch so yes can turn off.
My DSW are all strange in Calendar , showing Bike day (I only ever run), under Run they look as expected however.
GPS 10.00
WiFi 28.15
CIQ 5.0.0
BMX 16.1.2
WHR 16.01.02
ANT/BLE 28.15
TSC 7.21
Sensor Hub 30.20
ETE 6.19.0.4
LHA 2.5.0.4