Why would you bother joining AUK if someone was going to share a Pdf of Arrivee with you? You'd need to enter more than 9 events a year for that to be worthwhile.
I joined to be part of the club, have my results recorded together and to be eligible for badges and member only events. I don't think I knew Arrivee existed at the time.
I do like the articles that aren't lengthy blow-by-blow accounts of rides best. One thing I'd love to see is pitches from organisers to do their rides. In fact, I don't recall seeing anything much written by organisers at all.
I think there's an increasing awareness that content has to be paid for, or it will cease to exist. The problem with electronic media is that it's too easily shared.
I inherited a couple of week's subscription to 'The Times', recently. I'd normally read the Guardian, but that's shrunk so much, that there's barely anything in it. I may have disagreed with a lot of the Times, but it was better written, and had more content.
It's a good sign that someone cares enough about Arrive to adopt a new design. I think that's only likely to happen if the result is something you can hold in your hand, A pdf could look like the AUK website.