And it's changed again....
I arrived at T1 last last night, and went to the short stay car park where Uber have been picking up for the last few months (this is where the Uber App directs you). It seemed very quiet, but it was after midnight.
Anyway, I got a call from the driver saying he'd arrived, but was at a new pick up point. He could actually see me, but he was in the "new" multi-story part of the the T1 arrivals. He said that yesterday was the first day that this was in use.
I'm not sure what it will be like when it's busy, but it does seem to be a bit of an improvement. There is now only an exit barrier, and the "price" is determined by number plate recognition. I think there were 5 exit barriers.