Will we ever see group content that isn't a dungeon on rails?

[Thandronen]

The numbers of those dungeons will increase with each main patch, until the community start to complain that there are too many dungeons in the roulette (see 2.x)

Seriously though, only having 2 options at the beginning of the first expansion is considered adequate? Also, I've never heard anyone complain that there were too many dungeons in the expert roulette. Most people tend to like variety, especially when it comes to any kind of grind.