Shawn, I just got the FSD hardware 3.0 computer installed in my July 2018 MX (actually, I think it was a late June 2018) and my experiences mirror yours. The NOA seems to be a little more confident, does not weave with merges and wider lanes. I am too scared to use mad max so I do usual speed at lane change and do not allow it to change on its own, since I have a better idea of traffic and turnoffs ahead, I reserve the right to cancel or allow lane changes.
You are right, if the sensors and cameras see fire hydrants (they don’t always) they show up as traffic cones. They can read stop signs and traffic lights but they are too small on the screen or too late to help you, you are already on them when they get big enough to see.
Last night was garbage night in my neighborhood and the one thing the cameras see, is garbage cans! They can see garbage cans for a block ahead, they can see them behind parked cars, it can sniff them out like crazy! The funny thing is, the cameras cannot see the parked cars hiding the garbage cans in the street, only the cans. It is very disappointing. I would like to know if there are large obstructing items in the street (like parked cars) but it is very unlikely that I will run into them!
Will try to upload some funny pictures!