Automated milking sheds allow the cows to come in and be milked on their time table, not the farmers. Over the last century or more there has been a massive increase in the milk production per animal via selective breeding, but the animals are still only milked on the old schedule of twice a day. This means for the last hour or two the cows' udders are distended with milk and girls are really "busting to go".
With automated milking the cows can wander in when they feel like it and be much more comfortable as a result. An Australian documentary I saw claimed that herds in automated sheds had an average of 15% greater milk production per animal with one individual achieving a 25% milk increase.
>>>" Hmm. Cows wander round with unique ear tags, also activity monitoring collars with connectivity and may even have a passive tag in an ear for the parlour feeder to identify them. Has this project really been necessary?"
It sounds like just a few cameras with facial recognition could replace most of the stuff you've listed above.