I flew on both the 787 and the A380 on Friday, back to back so to speak. I have to disagree with your comments. The A380 felt much more spacious and this is backed up by the extra inch or two of pitch in Business compared to the 787. There it felt like everyone was really crammed in.
I thought that the bar was amazing. Having experienced the bar on the Emirates A380 the Qatar one is in a different league. Like any bar it's no fun just sitting on your own. Use it as an opportunity to talk to people, then you'll get what the bar is all about.
Two things I didn't like so much about the A380. The long unbroken business class cabin and the rear toilets, which are way too small.
Given the choice, I'd pick the A380.