I got HW3 upgrade a couple of weeks ago on our 2017 Tesla S 75D HW2.5. No cones appear and the car does NOT recognize them on autopilot either. I do however have the lights, stop signs and ability to stop at them. I told Tesla and they setup a service appointment but just got back to me and said that it is a limitation. I told them that not recognizing traffic cones is not acceptable for FSD. The won't tell me what the limitation is or if they plan to overcome it.
Just Tesla covering their ass. They didn't realize MCU2 was really needed for FSD back when they made all these promises. Now they are just going to *sugar* over legacy owners and give us a bare bones version of FSD.