That book captured my imagination precisely because it DIDN'T employ the tediously dry - often prohibitively so - point scoring, pseudo-academic discourse of any other archaeological work I'd picked up beforehand (the occasional dry wit of Aubrey notwithstanding). I've always held the opinion it's rather easy to become an expert upon something that will never allow definitive resolution of even such a basic question as 'what was a stone circle for?'. Cope was clearly coming at it from a different, irreverent direction with, crucially for me, an emphasis upon how these places made him FEEL combined with an altruistic, all-inclusive clarion cry to the reader to go and see for themselves.
It was the format of the book which I believe enabled Cope to share his enthusiasm so vividly, so I see no reason why the format of the website should change. I hope he - and those who give up their own time in support - feel the vision was worthwhile.
Off the subject of changing the website, but I reckon you can't help learn *something* by spending lots of time at these places, you might get good at finding them for a start :) You might learn to see patterns in landscape placement, or construction similarities, or even about geology of the stones. But what you most definitely do not gain is an all-knowing expertise, any more than you do from reading lots of books really. If anything, there are more questions all the time, rather than answers.
I know it sounds like a trite cliche, but I've learned far more about myself from visiting sites than about the sites themselves. And they still keep pulling me.