I think Anet should continue doing what they started, but be more consistent. Abolish all professions and just have one heavy, medium, light profession with plenty of branches while levelling. At least this will give the illusion of progression better...
I would like to remind everyone that this interview is about the feature patch specifically which is why the topics that are discussed are there instead of other ones. There are questions I would love to talk about with Colin given the chance, but they weren't appropriate for this interview.
Also I am embarrassed that this didn't make it into the original write-up, but Colin mentioned that the megaserver system, combined with the trait hunting system also allows them to more aggressively add new zones/areas. Couldn't get anything more than that out of him though so take it as you will.
2. The new deathmatch map is just the beginning, just like the article explains. If it is received well, then the mode will be developed further likely with more setups for the mode and making it available outside of custom arenas.
3. They aren't, but even if they did it wouldn't be unusual to have multiple game types in a random arena system.
Popularity can be gauged by looking at 1. Random Arenas players from Guild Wars and 2. The demand for Random Arenas/Team Arenas from Guild Wars players. What more reception are they looking for? It is what_people_want. Is Deathmatch even out yet?