Everyone I spoke to was told "DSO only". Can't vouch for when others were giving them out, but I'm pretty certain if you came to the team you'd have been asked which world you were on, which in your case would have been UK1.
As for feedback about where they are going, the Game Designers were really excited about Halloween, as you can see now a lot of cool new ideas going in there. They also mentioned about PvP being on the road map and being worked on, as seen as an announcement not so long ago mentions. But they're working away on it!
When I was there at the same time as the Designers, there was a German group there showing buildings they've made themselves (a lot like the ones Yoonooz has made here) to the designers but they were mostly talking in German, so couldn't really understand much, just bouncing ideas back and forth I believe.