It sounds like you care about UX a great deal, and the UX currently suits you fine!

I mostly agree with you; it has a few pain points, but I fear the day when it goes through the great Digg/Reddit redesign and becomes virtually unusable due to information density plummeting to zero.

I think it's not likely to go that route, though - since it's owned by Amazon, it doesn't have to be profitable by itself, it just needs to result in enough referrals to buy books on Amazon.