I would definitely pay $60.00 for an expansion, even though I am still fairly new and not finished with current content. I would buy it anyway!
Also, I would definitely love to see $200.00 lifetime sub available and would jump at the chance to get that.
It would be awesome to see AoC2 somewhere on the distant horizon, especially since EQNext looks like pure fail-sauce. Think about it Funcom!
AoC as it is will keep me busy for a long time, but is always good to have something to think about for the future.