This is a tough one because the immediate response would be to want to ask/plead for a specific feature or content type you want individually, or to express some sort of personal complaint. But that's not really something you're going to get any sort of answer to even if you can phrase it in a way that isn't immediately entitled or rude. Though I'm sure most of the questions of this sort are things they have heard before and have a set reason for not having already implemented or addressed.

Anyway, I would probably ask something along the lines of "Where do you see the game in 2 years or 5 years?" with a potential addition or follow-up about what sort specific content or direction that would personally like to see added or updated in that time.

Could be interesting to see what they have to say about the direction of the game in the future.