I don't think that this implies that the game is feature-rich. I could also suggest a lack of imagination on ANet's part for devising features that aren't just modifications on things that the game already offers. Note, I'm not saying that it is or is not either one -- only that both are possible explanations. The truth probably lies somewhere in between.
For example, greater variety or flexibility regarding weapons and skills would be a feature welcomed by many players. Introducing such a feature, however, would probably be at loggerheads with their already-revealed balance changes. In that case, it might not be a lack of imagination but rather a preference for maintaining balance that prevents us from seeing more weapons and/or skills. Alternately, their metrics might show that many of the weapons and skills are already underused and they reason that balancing them better could result in a de facto increase in the number of "available" weapons and skills.