The loose washes in the background feel right for scale, they read like atmosphere, like the kind of gradient you get when twilight hasn't decided what temperature it wants to be yet. If you're going to A2, that atmospheric quality will carry the size better than adding more edge detail would. What you have balances.

The loose-with-structure question is honestly the game, you've named it right. What pulled you toward watercolor for this kind of subject? Stick around, the room sees this work.