Wait till spring break in schools or better yet, summer. I'd LOVE to be finishing all my textures but I personally don't have time. I'm sure a lot of other gata members are busy with school too.
But yeah, for a group this large, the activity is a bit low. However, I don't think recruiting more would be the right solution. Sure, we'd have the activity we crave, but it would come at the cost of lowered standards. Unless you mean to go out to the textures and art boards to scout and send invites.