Final Crisis: What's it all about?

Big Mike over at Second Printing!! says what he thinks it's about:

I was talking to Ben about it, and he viewed it to some degree as a meta-admonition of the fans. 'We're the monitors,' he said. 'Sucking the life out of comics.' Maybe. But I want it to be more. I need it to be more.

I want it to be about the triumph of imagination over despair, and the immortality of true heroism. About how those who devote their lives to something greater than themselves might all have 'To Be Continued' etched into their gravestones.

Me? I want to think that Big Mike's right, but I saw Final Crisis as more of a mess of ideas trying to glom onto a weak plot I've seen before.

Also, I'd have liked the series to tie back into Countdown by having Piper save the day. That's just me, though.